Reef Central Online Community - View Single Post

Fizz71 · 05/15/2009, 02:25 PM

I'll keep my answer to your original question to further your consensus.

When I think about % change I take a guess at my system's total water capity. I have a 240g display tank and a 100g sump but I have a DSB in the sump and don't run it up to the rim, and neither is my tank. So I do my math based on a 300g system.

I have a 55g drum of SW mix and a 55g drum of RO. I never fill the drum to the lid or suck it dry so I round it all to 50g water change whenever I do it. So I'm looking at a 17% water change whenever I pull the trigger.

05/15/2009, 02:25 PM	#14
Fizz71 FragSwapper Join Date: Oct 2002 Location: West Lawn, PA Posts: 5,800	I'll keep my answer to your original question to further your consensus. When I think about % change I take a guess at my system's total water capity. I have a 240g display tank and a 100g sump but I have a DSB in the sump and don't run it up to the rim, and neither is my tank. So I do my math based on a 300g system. I have a 55g drum of SW mix and a 55g drum of RO. I never fill the drum to the lid or suck it dry so I round it all to 50g water change whenever I do it. So I'm looking at a 17% water change whenever I pull the trigger. __________________ --Fizz Current Tank Info: Current system is 8x2x2 240g peninsula setup with a single "chamber" 100g sump in the basement with an RDSB. All corals are 100% home grown from frags of fellow reefers (low natural reef impact).