Milez803 Posted July 13, 2019 Report Share Posted July 13, 2019 Hi All,Need some advice on my CRS Tank. a little background about the tank. I started the CRS tank about a year ago with Fluval Shrimp Stratum. The tank has some seiryu rock ( big mistake), drift wood, and Guava leaf and is filter by sponge filter. In the beginning I was able to maintain the PH at 6.8 with the substrate, and I use RO water mix with Salty Shrimp +GH. Over a period of time, I notice my CRS shrimp stop breeding, so I tested the PH and the pH was at 7.4. So i changed water with mixed RO and Salty shrimp at 6.8. I changed 25% of water at a time, however, the PH never even drop. And after testing my KH, the water is literally at 0. Then after some online research, found out the Seiryu rock increase ph. So I took out the rocks and changed water again, however, even with 3 water change over 2 week period, the PH still maintain at 7.3, KH at 0. My guess is that the Fluval Stratum absorb the rock mineral and won't allow my PH to drop. I even took some new controsoil and put it in a container and drop it into the tank and the PH still doesn't drop. So I bought a bunch of IA leaf and toss it in. If anyone have any advice or reason why my PH won't drop, I would really appreciate it. ThanksMilez Quote Link to comment Share on other sites More sharing options...
rhoagland Posted July 15, 2019 Report Share Posted July 15, 2019 Your substrate is exhausted and needs to be replaced. Fluval stratum doesn't last much over a year under normal conditions and it's buffering capacity was reduced by adding the seiryu stone. Quote Link to comment Share on other sites More sharing options...
raidx259 Posted September 16, 2019 Report Share Posted September 16, 2019 How often do you change your water? And what type of water are you using? Quote Link to comment Share on other sites More sharing options...
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