treatment by Interpet thinking that this may be the problem ?
litre tank with 2 apple snails ammonia at 0.1ppm (messy fish hard to get to zero) nitrite 0ppm nitrate <5ppm Ph 7 (hard to make exact colour on card but with daylight behind me most closely approximates this colour. I have a Rena xp2 canister filter and 3 weeks ago also added a Fluval 304 in a further effort to reduce ammonia to zero. there are no plants only the plastic aquaria friendly type and about 1 1/2 inches of gravel and finally an air pump driven air tube for oxygenation of the water - oh and a powerhead for even further circulation.