Rice Reef's 120 SPS Reef Tank

[Rice Reef]

Originally Posted by freezetyle

Thats the ticket. You might have to deal with the extra iron in your tank wayne and run gfo intermittently.

Yep, I may just have too. After reading more on Zeozym I am thinking that it could be breaking down the proteins in the rocks thus resulting in this sudden po4 spike. Just did another 20 gallon water change. Tested the water before the change... Still at .21. Will be testing the water tomorrow and hope that it has dropped... Will be preparing another batch of water in the morning. So far no casualties ( knock on wood )...

[Delphinus]

Originally Posted by freezetyle

Thats the ticket. You might have to deal with the extra iron in your tank wayne and run gfo intermittently.

Does running GFO tend to increase the iron readings in the tank? I know you can get test kits for iron but I've never tried one.

[Rice Reef]

This morning's po4 reading was .25... It went up. After a strong cup of coffee I traced back to everything that i did in the last four weeks, including the water changes... could it be a defective Hanna or the RO unit? I don't recall checking the RO water lately... I had just made a fresh batch this morning... The TDS read 016. Tested the tap water... .019... Then it hit me... I forgot to change the RO units membrane! To be certain I took it to a LFS and had the tap water and the tank water tested and it came up with very similar results. The last four week of water changes was all for nothing. I could have prevented the build up of po4 had I used the TDS meter.
Will be making a large batch of RODI water tonight ( with a new membrane).. . The lesson learned is to not assume the water is po4 free even though the last batch was. I will put off in using GFO at this time and try reducing the po4 naturally. Will be testing the po4 regularly for now.

[lastlight]

Originally Posted by Delphinus

maths...

Quick refresher for those of us who are rusty:

http://vimeo.com/13497928