I am very new to goldfish. I bought a black moor and a ryunkin about three weeks ago, and my moor died this morning. Was very sad, he was such a nice fish. I'm afraid that I killed him and that the water quality was the culprit. In the interest of preserving the remaining fish, I am looking for some advice on what to do for water changes. I have a 10 gallon tank, the living fish is about 1.5" long not including the tail.
I have been changing about 20% of the water every 2-3 days to try to keep the ammonia levels down. Nitrates and Nitrites are at 0, but the ammonia climbs up to about 2 ppm and I can get it back down to around 1 with the changes. It is a new tank so from what I've heard this is normal but again, I've already lost a fish. I have been using distilled water for the changes but someone mentioned that this was not good as it is missing electrolytes the fish need. The tap water comes in at a really high Ph (8.5+), so my new idea is to mix this 50% with distilled water to bring down the Ph.
I bought NovAqua and AmQuel+ but am not sure what to do with them. Should I use straight tap water and put in the conditioner, then let sit, then add to the tank? Is the mix of distilled water with tap a good idea? Should I treat the tank directly, or the added water, or both? If I am only changing the water, should I just use very small quantities of the conditioner, i.e. if I'm changing 2 gallons should I use 1/5 of what is recommended for a 10 gallon tank? How long should I let the change water sit before adding, if at all? Some people recommend adding salt to the tank as well, would this generally be a good idea? I plan on continuing frequent changes until the bio filter has become established, but should I slow the changes and rely on a conditioner to clean up the water instead?
Sorry for all the questions but I don't know where to begin at this point. I've read a lot of different things and am not sure what to do, and I am very worried I may lose the remaining fish.