Hello all, my name is Chris and recently I purchased my first fish tank. It sounds daft, but it has been a lifelong ambition after being mesmerised by the fish tank in my doctors surgery as a child. It is a second hand 20 litre Blue Water tank with a three stage filter (bioballs; nylon wool; ceramic rings) and aeration.
I cycled the tank for four days with StressCoat and Stress Zyme, and achieved a pH of 7.3 before adding five neon tetras. A week later I added two pigmy corydoras and a betta. All appeared to be going well for a couple of weeks (albeit I suspect I may have been overfeeding), but then I noticed my betta appeared to be struggling to breath. I ran a two stage ammonia test and found a level of 4ppm. I added AmmoBlock, an ammonia removing filter media, and have been changing 30% of the water each day being careful to match the temperature of the new water with my tank which is at 26 degrees.
All of the fish other than the betta appear fine, but for the past few days he has been lying on his side, is not eating, and continues to appear to be struggling to breath. The ammonia level is currently at 1ppm. Any advice would be gratefully received, but specifically I am interested in:
1) Ways to keep the ammonia under control in a new tank given what I have done to date.
2) Whether my betta is likely to recover, at what point I should consider euthanasing him, and if I do this how to do so humanely?
3) How long each day I should run the light and aerator
I am enjoying the hobby immensely, but the learning curve is steep, and I am obviously sad to watch my first ever betta suffer!