Keep using that bacterAE! I also have been using grains of pollen to help with survival rate. Might want to take a look into that as well. But be cautious where you buy yours from as pesticides in hives ect ect. I personally bought mine from https://marksshrimptanks.com/
. Maybe I do not need to be cautious but I know too much on bee keeping in the US to not. I just had to dose with Fenbendazole and worked out great. Only draw back was the dead snail removal. Looks like your tank is doing great! Always enjoy watching this thread.