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  #1  
Old 12/14/2006, 01:30 AM
Clint0912 Clint0912 is offline
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Low pH

I'm currently cycling my tank with cured live rock. It seems to be on track, ammonia is at 0, nitrite is at 2 and nitrate is at 10ppm. But my pH is at 7.8 Will my pH rise as the other reading get stable or is there some other problem.
  #2  
Old 12/14/2006, 01:32 AM
drummereef drummereef is offline
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It is low, but in the range of acceptable pH (Randall Holmes-Farley). Most pH issues are from a buildup of co2 in your house. If you can let some fresh air in it will help. If you have a glass cover on the aquarium, take it off. The gas exchange will be of benefit. You will also see pH shifts from day to night. After the lights go out the pH will fall. It will rise in the day.
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  #3  
Old 12/14/2006, 01:44 AM
sir_dudeguy sir_dudeguy is offline
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pH is not dependant on amonia and nitrite. But do you have a glass lid over your tank (or plastic for that matter). If so, take it off.

Get better surface agitation (point a powerhead upwards or get a hob filter and run it empty/with carbon).

Take a glass of your water and put it outside with an airstone/bubbler thing in it for a couple hours. Then test for pH. If it has risen, you have an indoor co2 problem and should open windows in your house more often
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  #4  
Old 12/14/2006, 02:12 AM
Clint0912 Clint0912 is offline
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I think I have pretty good surface agitation but I'll look at adjusting the returns.

I do have a plastic hood (thought it would be good for, jumping fish and evaporation)

I've also been running with no lights, I read you should run the live rock in the dark for the first week.

I'll try the glass of water outside and some of the adjustments you both suggested. Thanks for the speedy replies.
  #5  
Old 12/14/2006, 04:02 AM
bertoni bertoni is offline
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Some of the decay products from the cycle are acidic, so low pH readings are common at that stage. I wouldn't worry.
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Old 12/14/2006, 08:12 AM
serpentman serpentman is offline
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I will echo bertoni's comments. Decay is quite an acidic process. I wouldn't be concerned with pH values until you are through your cycle. More importantly, keep an eye on ammonia, etc.
  #7  
Old 12/14/2006, 11:17 AM
sir_dudeguy sir_dudeguy is offline
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There are better ways to keeping fish in the tank than having a lid on it. The easiest way is to just get a canopy with an all open back, and then just put egg-crate over just the back (keeps fish in, but lets air in so you dont have the problems that lids give you). Another good thing about canopies is that you can just retrofit your lights into it. You dont need to buy a whole light fixture. You can pay for just the "barebones" part of it and just get the electrical stuff.

As for lights off during cycle. Some say do it. I see no reason to. I've tried it both ways and it really made no difference in the end. When i left the lights off, there was no diatom algae during the cycle...but then once it was over i started turning them on and the diatoms popped up then.

On another couple tanks, i just said "what the heck" and left the lights on their regular light cycles (mostly cuz i had corals attatched to the rocks). I had the diatoms within the first week and then they were gone. Now to me...it makes more sense to do that, so i will do that from now on. Just get the diatoms out of the way asap then you dont have to deal with them later on. Now wether or not thats supposed to work like that...i dont know. But it has for me each time i've done it, so i'll continue to do so
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  #8  
Old 12/14/2006, 09:57 PM
Clint0912 Clint0912 is offline
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Quote:
Originally posted by serpentman
I will echo bertoni's comments. Decay is quite an acidic process. I wouldn't be concerned with pH values until you are through your cycle. More importantly, keep an eye on ammonia, etc.
I read a good article in the online mag stating exactly that.

I'm going to tweek my returns for more surface agitation and wait for the cycle to end before I worry. Would hate to have to leave my windows open during the winter

Actually had already ordered a glass canopy with an open back so that should help as well.
 

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