I've had an empty quarantine running for a few months now, with a filter in it and 4 large PVC
tubes for bacteria (and a heater).
I've been dropping in food every 2-3 days.
There's been just one waterchange done in it since it was started about 4 months ago, so therefore there's a lot of rotted food stuck to the bottom and on the fittings etc. (just looks like brown powder, it was frozen gamma/mysis etc.). This will be almost impossible to get out, so it'd have to stay in there.
I'm just wondering, if I now do a 50% waterchange, do you think I'll still be ok to use the QT
for a new fish?
I havent tested my readings for a couple of months, but the last time I checked ammonia was 0 and nitrite was about 2. I just checked today, and ammonia is 0 and nitrite is also 0. pH is fine and so is SG
After the waterchange, do you think I'll be ok to go ahead with putting a new fish in it? It's 15gal by the way.