12-10-2009, 01:40 PM
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Hets and Angels + Mystery Deaths + Help!!!
I have been discussing my tank issues with Byron and he suggested I post my problem here to get some additional opinions on the situation. Here it goes:
I have a 75g freshwater tank that has been running for two months. I currently have 7 Koi Angelfish, 14 Rasbora Hets, a bushy-nosed Plecco, and 6 Japonica shrimp. I have tested my water weekly since the tanks inception and have never had nitrite or ammonia readings over 0 ppm. Recently, my fish have not been doing well. I have lost four Rasbora Hets in the last week and now one of my Angels looks very lethargic and has confined himself to one corner of the tank. I see no signs of parasites (no bulging or rubbing against rocks). As I told Byron, my water is very hard (300ppm, PH 8, Alkalinity 80 ppm). This is probably out of the recommended range for Angels and Hets but these fish have all been born and bread locally in similar water conditions. There is lava rock in the tank, two HOB filters, and no plants yet except for some moss balls. Temperature has been steady at 78F.
The fish have been in the tank since it began cycling which lead Byron to suggest that either they suffered ammonia or nitrite spikes early on and are just now showing the effects or the water hardness is starting to stress the fish out.
Can anybody provide further insight or does anybody have other opinions? Obviously I do not want to lose my Angels as they are very beautiful fish. Thank you very much.