When I turned my tank lights on this morning I realised this fish had white markings on it. I am currently getting rid of an ammonia spike. Think it was caused by the bristlenose kicking all their eggs out then they started to fungus and I didn’t realise. Also when I feed them they kick their food in between their caves sometimes. I have know learnt to siphon in between The caves to get up all left over food amd poop. I am doing 50% water changes daily to get rid off the ammonia. Do you think that could be the problem. The ammonia is at 0.25 - 0.5 ppm. The tank is 105 litres and has 2 female and one male. It’s has two large sponge filters. Ahould I start putting some medication in? Also I have stopped feeding the last few days until the ammonia is 0. And the Red by the tail has noW gone after a hour.