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Old 10/30/2008, 02:17 PM   #351
Aquarist007
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Quote:
Originally posted by WaterKeeper
CO2 is a product of respiration. You, or your fish, exhale CO2 with every breath. During the day the sun allows algae to use CO2 as food. That is, through photosynthesis they use the carbon to form simple sugars. At night they use the sugar as fuel and to build new tissue. In doing so they also release CO2 back inot the water. This is what causes a diurnal pH shift in the aquarium.

CO2 is also used for calcium reactors. It forms acidic carbonic acid in water and that can dissolve limestone. By bubbling a stream of CO2 through a column packed with limestone some dissolves. This provides both calcium and alkalinity for the tank.

As an aquarist we need to control the amount of CO2 in our tanks. Too much lowers pH and reduces the water's oxygen content. Good gas exchange is therefore a must. Aeration will strip CO2 from the tank and help keep it under control.

Hope that helps.
waterkeeper is right on the mark--but then he is waterkeeper

to further add to methods of aeration in the tank:

big time--keep the surface of your tank uncovered(eg glass covers ect) and keep the surface turbulent

flow--20-40 times the vol of your tank in gph

protein skimmers---ensure a good deal of oxygen exchange

refugiumus---as mentioned above--the algae use carbon dioxide and replace it with oxygen through photosynthesis
the algae also uses phosphates and nitrates for your tank--making a refugium IMO a great asset to any system.

If you come to a situation with low pH or the pH lowering then approach from an increase in carbon dioxide in and around your tank. Checking the above or even opening a window in the fish tank can make a difference in the pH.
It is not a good idea to use buffers to raise pH---they tend to also raise the alkalinity level also with boran---not a good thing.

I can explain further if you want


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Old 10/30/2008, 02:19 PM   #352
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Quote:
Originally posted by WaterKeeper
Thanks for catching that Scott. I missed Alan's reply as I was so amazed with Lonnies post.
right --you miss something on here---that's like PaulB stating he doesn't like seafood anymore


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Old 10/30/2008, 03:24 PM   #353
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Sea what?



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Old 10/30/2008, 03:39 PM   #354
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Quote:
Originally posted by Paul B
Sea what?
and we've got the salad to go with it:




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Old 10/30/2008, 06:03 PM   #355
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Now thats a meal


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Old 10/30/2008, 07:53 PM   #356
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I prefer the blue rings myself. Helps with my toxic humor.


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Old 10/31/2008, 07:17 AM   #357
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Quote:
to further add to methods of aeration in the tank: big time--keep the surface of your tank uncovered(eg glass covers ect) and keep the surface turbulent flow--20-40 times the vol of your tank in gph
As it's sometimes impossible to flow 20-40 times the tank volume through the sump and refugium via the return pump, what's a good ratio of return pump GPH to in-tank circulators GPH?
I am contemplating a 250 gallon so 40 times that is (let me get my abacus out - or is it incubus I never can remember ) around 170 GPM.


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Old 10/31/2008, 08:58 AM   #358
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I tend to have a someone lower range, on the order of 10-20X but much depends on what you place in your tank. Some corals like the real high flow but others perfer a more modest pace. I'd therefore suggest figuring 20X flow. Rounding off, about 80 gals. per minute should be fine


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Old 10/31/2008, 09:21 AM   #359
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Quote:
Originally posted by EnglishRebel
As it's sometimes impossible to flow 20-40 times the tank volume through the sump and refugium via the return pump, what's a good ratio of return pump GPH to in-tank circulators GPH?
I am contemplating a 250 gallon so 40 times that is (let me get my abacus out - or is it incubus I never can remember ) around 170 GPM.
IMO there is a little confusion here

The ideal range of flow through your tank is 20-40 times its vol in gph and that is for lps and softies. SPs corals have even greater flows then that

but

the flow through your sump should only be 5-10 times the volume of your water column in gph
Ideally it should match the flow rate of your protein skimmer. That ensures that unskimmed water is not being returned to the display tank.

BTW if you don't have a closed loop in the 250 then two of the new Koralia 8's each deliver a turbulant flow of 3200 gph each and at 160 bucks a piece --that's a deal.


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Old 10/31/2008, 10:01 AM   #360
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Happy Halloween!




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Old 10/31/2008, 02:35 PM   #361
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Quote:
Originally posted by WaterKeeper
Happy Halloween!

is this the day we finally see real pictures of you

I think you should be hammering the candidates for universal dental plans


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Old 10/31/2008, 03:00 PM   #362
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Anyone keep one of those? It is the ugliest fish in the ocean. I guess one needs a really deep tank to have one, like about as deep as Mt. Everest, but it would scare off just about everybody at a party. I wonder if there is a giant varity, as they don't grow that big?


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Old 10/31/2008, 04:10 PM   #363
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Quote:
Originally posted by WaterKeeper
Anyone keep one of those? It is the ugliest fish in the ocean. I guess one needs a really deep tank to have one, like about as deep as Mt. Everest, but it would scare off just about everybody at a party. I wonder if there is a giant varity, as they don't grow that big?
what is that--an eel?

I think I read some where that this is the largest fish known to man--and the deepest running:




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Old 10/31/2008, 04:25 PM   #364
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No a hump-back, black angler. Only grows to a foot of so. At least those that have been observed.


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Old 10/31/2008, 04:35 PM   #365
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Quote:
Originally posted by WaterKeeper
No a hump-back, black angler. Only grows to a foot of so. At least those that have been observed.
are they reef safe


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Old 10/31/2008, 05:15 PM   #366
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Not on Halloween night they're not.


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Old 11/01/2008, 09:01 AM   #367
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Quote:
Originally posted by capn_hylinur
IMO there is a little confusion here. The ideal range of flow through your tank is 20-40 times its vol in gph and that is for lps and softies. SPs corals have even greater flows then that
but
the flow through your sump should only be 5-10 times the volume of your water column in gph
Ideally it should match the flow rate of your protein skimmer. That ensures that unskimmed water is not being returned to the display tank. BTW if you don't have a closed loop in the 250 then two of the new Koralia 8's each deliver a turbulant flow of 3200 gph each and at 160 bucks a piece --that's a deal.
Capn
Thanks for the clarification and advice on flow rates. My gravity feed from the DT will be split (via ball valves) between the sump (for skimming) and the refugium (which will then gravity drain to the sump).
If I have to match the flow rate with the skimmer and the refugium flows into the sump, should the flow rate through the sump only be the rate of the skimmer or the combined flow rate of the sump and refugium? I guess what I'm getting at is should the gravity flow from the refugium be skimmed or fed directly to the return pump section of the sump?
Thanks in advance.


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"Never in the field of human conflict was so much owed by so many to so few. "
Sir Winston Churchill praising those young RAF pilots.
August 20th 1940
Click on my name for drop down list and select "Visit EnglishRebels Home Page" for my build thread.

Current Tank Info: 60x30x24 200G AO custom glass tank, basement equipment room, 30G and 55G Fuges, LifeReef sump & 30" skimmer.
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Old 11/01/2008, 09:12 AM   #368
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Alan,

I'd run it toothe return pump as the skimmer tends to trap pods and such in the bubble train and remove them from the system. You want them to migrate to the display.


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Old 11/01/2008, 11:53 AM   #369
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Well I am HAPPY to report that my first overflow box works with only two little leaks. A little Weld 16 and all will be fine. I followed Marc's (melevsreef.com) directions and they worked excellent. Not only that but the wife even seemed intrested in what it was and how it works, she's starting to get hooked which means good things. Next on my list is a sump tank.....

Lonnie


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Old 11/01/2008, 12:03 PM   #370
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Quote:
Originally posted by Blown76mav
Well I am HAPPY to report that my first overflow box works with only two little leaks. A little Weld 16 and all will be fine. I followed Marc's (melevsreef.com) directions and they worked excellent. Not only that but the wife even seemed intrested in what it was and how it works, she's starting to get hooked which means good things. Next on my list is a sump tank.....

Lonnie

good news Lonnie--good luck and keep posting. Be sure and check this thread for information on sumps and fuges:

http://www.reefcentral.com/forums/sh...readid=1349443


Good news about your wife too---this early in the hobby it means less time of perptuating the myth that everything you buy "costs 20 bucks--thats all"


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I prefer my substrates stirred but not shaken

Current Tank Info: 150gal long mixed reef, 90gal sump, 60 gal refugium with 200 lbs live rock

Last edited by Aquarist007; 11/01/2008 at 12:09 PM.
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Old 11/01/2008, 12:07 PM   #371
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Quote:
Originally posted by WaterKeeper
Alan,

I'd run it toothe return pump as the skimmer tends to trap pods and such in the bubble train and remove them from the system. You want them to migrate to the display.
agree 100 per cent also:

With the two ball valves you will be able to control the flow quite well. Number for flow rates have been discussed and discussed on here before
IMO--I would judge the flow rate by observing the refugium for awhile---if the flow rate is too much then it will be picking up too much nutrients from the tank--look for signs of cyano and the red stringy algae caught up in the chaeto.
In that case I would have less flow going to the refugium(s) and more going to the skimmer part of the sump.


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Old 11/07/2008, 11:24 PM   #372
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Well how do you know when you've been bitten by the saltwater bug? When you go to buy a Mag 7 and come home with a 65 gallon pre-drilled tank, stand, heater, Mag 7, 30 gallon sump and a power head for the price of the Mag 7 new. I no sooner checked my sump for leaks (none) and was looking on craigslist for a Mag 7 trying to save some coin when I found the above for 125. I think I did ok, it needs cleand up.

Lonnie


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Old 11/08/2008, 06:28 AM   #373
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Sounds like a good deal to me Lonnie. Probably being sold by some Newbie Reefer who took my advise.


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Old 11/08/2008, 09:15 AM   #374
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WaterKeeper
Back on the QT trail When QTing live rock is it okay to run DT water through the QT tank and back to the sump with suitable traps for any bad hithchikers or do we need to QT the rock as we would fish?
Thanks


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"Never in the field of human conflict was so much owed by so many to so few. "
Sir Winston Churchill praising those young RAF pilots.
August 20th 1940
Click on my name for drop down list and select "Visit EnglishRebels Home Page" for my build thread.

Current Tank Info: 60x30x24 200G AO custom glass tank, basement equipment room, 30G and 55G Fuges, LifeReef sump & 30" skimmer.
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Old 11/08/2008, 09:28 AM   #375
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Darn Alan you come up with some good questions.

In theory, yes you can. If you have a 1 micron or less filter installed between the two it will trap most all pathogens; save some very small bacteria and almost all viruses. A good UV will also eliminate most, if not all, from the reticulating water.

I've always promoted using a canister filter with micron cartridge for freeing a tank of microbial pests as it is cheaper and processes more water volume than a UV. When hooking tanks together a UV is a good solution as it can rid the tank of things too small for most filters to eliminate.


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