Hi all. I have a 35gal planted african cichlid tank. had 7 fish but I lost 2 to unknow illness. Water checked out fine o ammonia, 0 nitrites, and under 10 nitates ph 7.4. did 2 water changes since then and now my Acei is showing signs of fin rot and is doing tail stands with no signs of ich. Then last night my Livingstoni started freaking out tail stands rubbing the sand and jumping out of the tank an hitting the glass top of the tank. dosed the tank with Mardel Brand Maracyn first day Acei stopped tail stands but Livingstoni still freaking out. I know the ph is alittle low and going to add some Barnacles to rise it up to 7.6 7.8. Is there anything else I can do?Would a drop in temp from 76-78F to 74F cause this? (Heater quit working, went i caught it it was 74f for I think 1 day).