29 gal long
water: very hard (used jungle testing kit, it turns dark brown and the level number underneath says 1000?)
I do a 25% water change weekly, last one was today.
Temp is at 78 F
No live plants. Marineland penguin 200 (50gal) set on low and Topfin 30 set on normal.
I feed them omega1 super color flakes, omega1 spirulina flakes, and bloodwoorms once weekly
I have 7 platies (4 adult, 3 very young - 1 male, 6 female), 5 neon tetras, and 3 dwarf gourami (1 adult male, 2 younger female). Since I have set up the tank (3 mos ago) I have lost one platy to dropsy. About 2 weeks ago, I bought 2 adult dwarf gouramis. I quarantined for 3 days (not long enough?) and they seemed fine so i added them to the tank. A couple days later, I noticed one of them acting strangely and her fin looked tattered. I thought the other may be picking on her, but after quarantining again it became obvious it was fin rot. I treated her with tetracycline with no luck, she died a few days later. (The guy at fish store told me to use tc but now after the fact I have read that the water hardness makes it ineffective.)
But anyway I'm really paranoid now. I know that dropsy is often caused by bacterial infection and fin rot is too. All of my fish seem fine, but should I treat with some sort of antibiotic anyway, as a preventative measure? I know that it can stress them I'm just worried that I'll come home one day and they will all be infected!! Everyone seems fine as of right now.
I also have added Kordon Fish Protector to the tank to try and help. Does it even work or am I wasting my money?
I am also worried about the hardness of my water. Could it be attributing to my problems? What about the pH? I have some jungle pH 7.0 if I need to use that.
Thanks for reading