My male zebra daino has transparent white bubble spots on its fins only for the past few months. I tried treating him with API super ich for about 1 week in a separate tank, but it did not cure or reduce the spots. I then tried putting him back in the community, raising the temp to 86° with salt and Melafix & Primafix for about 2.5wks; but nothing changed. Now one of my female dainos has it on her fins only. None of my other fish in the tank have this. Any idea what this is or how to treat it?
My fish community consists of 4 Zebra Dainos (three are golden and one is grey), 2 Guppies (recently have 12 of their fry), 3 Corydoras, 2 Kuhli Loaches, 3 Ottos, and 2 snails.
My water measurements are perfect except nitrate (probably from too many fish), but I keep that under control with weekly water changes. My tank temp is between 74°-75°. I use Seachem Prime (in new water for water changes), Stability, Pristine, SafeGuard, and Matrix media. I have an Aqueon 30 gallon filter, bubble wall, double sponge filter, and recently a small bubbler. My substrate is sand.
Any ideas would be helpful since it seems like it has passed onto a female zebra daino.