I'm moving to a new place this weekend and went to set up the large tank for my Jack Dempsey last night. He's in a smaller tank now and this is an upgrade. I tested the tap water and the results were a little scary. 0.25 ppm ammonia (which I know is likely ammonium from the chloramines) I had already been planning on using a bucket with a purigen filter for my betta's water changes since he has a lot of fin rot problems no matter how clean his water is. But the REAL concern is 0.5 ppm NITRITE!!! I have been reading up and it appears it's not very common to have nitrites in tap water. The EPA limit for nitrite in drinking water is 1.0 ppm. Gross. I'm planning to buy a RO filter because I have no desire to be drinking water with any kind of nitrite in it, and I will use the RO water (with necessary additives of course) for my fish. But I won't be able to afford the filter for at least a month, so what can I do in the meantime? I am already using Prime which is supposed to detoxify ammonia, nitrite and nitrate for 24 hours, at which point the beneficial bacteria in the tank should convert everything to nitrate (the tapwater has 5.0 ppm nitrate which is obviously not ideal but not as big of a concern as the nitrite IMO.) The betta tank is 100% cycled but I'm still worried about him since he is already not in the best shape and pretty sensitive to water quality issues. The JD is much tougher, but I'm worried the new tank won't be cycled enough to handle the nitrite. I got him with his old 29 gallon tank about 2.5 months ago. It had been set up for so long it was having old tank syndrome symptoms which I fixed with two additional filters and daily 30% water changes. It's obviously still cycled, but after I added a 3rd new filter I threw out the old filter that came with the tank because it was basically falling apart and disgusting. So the old tank is cycled but all 3 of the filters have been on it for less than 3 months. I moved the sponge filter over last night. Tonight I'm going to move the cascade filter, and tomorrow I will move the canister and the fish has to go in the new tank. Do you think it will be enough? I'm freaking out!!! Anyone else dealt with nitrite in tap water?? It seems like it's hard to remove.