Hey all,
I’ve had a stable fish tank for a couple of years now. Consistantly, the water has been hard, and has been very alkaline (7.4 range). However, recently, I noted that my fishes fins were looking a bit ragged and bloodshot. I ran the pH recently, it’s it’s gone totally acidic on me (6.0). So far, I’ve added some buffer, and did a 30% water change, hoping that the hardness of my tap water would help to balance it out, but so far it hasn’t moved much more than to the 6.4 range (this is the third or fourth day of trying to fix it).
As for the tank, it’s 30gal, and contains goldfish and some guppies- which I’ve had about 3 years now. There is a large hood based filter running right now (filter is made for a 40 gal tank), and I don’t typically add a lot of chemicals or anything to the water. Within the past few months, my fish did have a problem with some fungal whatnot, which I cleared up with some tablets. And now, I’m having issues with this. Any ideas?















