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Old 04/29/2021, 08:09 PM   #1
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Join Date: Mar 2004
Location: Washington DC
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Material use in sump

What type of material is safe to use for in salt water without fear of corrosion or harm to reef inhabitants ?

I have used egg creates, and of cause PVC pipes.

The ideal water depth of the new skimmer (Bubble Magus Curve 7) I got is 11". My current sump setup has a water depth of 14" I would like to increase the water depth of my new skimmer by having it sit on a brick or 2x4 wood. That should make up for the 3" in height.

Is it safe to put brick or wood in a reef setup ?

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Old 04/30/2021, 04:36 AM   #2
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I wouldn't use either of those. The brick might leach contaminates into the water, as would be possible with the wood, and also I can see the wood swelling. Not to mention the buoyancy factor.
There are several inexpensive ones available or you can DIY one pretty cheap.

"I never make mistakes...
I thought I did once, but I was wrong"

Current Tank Info: In the process -
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Old 04/30/2021, 06:50 AM   #3
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Wood definitetly would not be a good choice. Concrete on the other hand should be although I would rinse it off well and maybe soak it in vinegar overnight. I would also avoid any conrete product that has gavel as the gravel may have minerals that might leach out so it's a big unknown and for the price of concrete bricks just isn't worth it IMO. Here's an intersting papaer looking at ideal substrates for "microfrags".

"Our crystal clear aquaria come nowhere close to the nutrient loads that swirl around natural reefs" Charles Delbeek
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Old 04/30/2021, 07:56 AM   #4
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What about just a pile of rocks?

FYI: I made the below when I had the same issue. It worked great took about 20 minutes to make. I used it for years.

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125RR in-wall, 40B Sump, CS180 BM Skimmer, ATI 4x80 watt, eheim 1262, custom wrap around rock wall, ReefKeeper Elite

120g in-wall, 40B Sump, PC 54wx4, Jabao DC-6000 (full siphon), future seahorse t

Current Tank Info: 125g, 120g, 2x40b sumps, ATI 4x80 T5HO

Last edited by fishgate; 04/30/2021 at 08:04 AM.
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Old 05/01/2021, 04:45 AM   #5
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I have the same thing as fishgate to elevate my skimmer in my sump.

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Old 05/02/2021, 08:18 AM   #6
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Location: Grove City, Ohio
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I made a simple acrylic stand for the one in my DT. For the FT, I made a acrylic box on legs that sits almost at the sumps water level (rubbermaid 100g stock tank, so no baffles) The FT drains to the skimmer box and then just overflows into the sump area. I use the space underneath it to place my heaters.

Wood would be a very poor choice for many reasons, as wood bricks. I'd avoid cement blocks unless you cure them adequately so that they don't leech into the water. Really, either a PVC/eggcrate or acrylic stand is your safest bet

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Current Tank Info: 120 mixed reef with 40b sump, RO 150 skimmer, AI Sol Blue x 2, and a 60g Frag Tank with 100g rubbermaid sump. 2 x Kessil A360w lights, BM curve 5 skimmer
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