My Father and I recently set up a 165 litre tropical tank, his idea was to in future buy discus. He was advised to put Neon tetra's in with them. We set the tank up on the 14 of August and put ten neons in that day, just to get the algae to build up. They all died over night. Two days later we brought 10 more. They all died within a day or two. We continued with this process a few times and more and more died. We purchased 20 more today and have had a few deaths already. Dad has had the water tested and have been told levels are all okay. As far as we know we are doing everything right. The neon's are near the surface of the water as if they are trying to reach air ? They are also breathing quite rapidly. Please, any suggestions and/or answers of what is happening would be apprechiated
It's very disheartening as we have realised that maybe we can not get/keep discus