I can say this is the first time I having this fish. I just bought a two pea puffers yesterday but today they totally doesnt move and just sit on the bottom of the tank. One of them were normal and moving around to search for food but right now this one doesnt move either. I have ada soil for the substrate and my PH is 6.4, Temp is 80.4. I have few anubias on wood and rocks and a large piece of driftwood in the tank. can anyone please give me some advise?