I feel really, really stupid. Phoebe is still in the harlequin's tank being treated for velvet seeing as she was stuck in there for 3 days while my siblings mom and I were out of the house. Velvet is not longer the major issue, seeing as that underlying issue has appeared.
The harlequins are pineconing and so is Phoebe *headdesk*. I feel absolutely horrible because if I used my brain, Phoebe wouldn't have been in that tank in the first place so my harlequins wouldn't be sick as well... and because I have no clue what is making them sick, obviously Phoebe brought it with her..... and with the other three bettas I've lost, I have a feeling the same issue is coming up. Chances are in less then a week they'll stop acting fine. Once they stop acting okay, they'll develop SBD issues, and then be miserable. Depending on whether or not I decide to humanely euthanize, they'll hang in there like that for several days, go off their feed, and then die.
I figure I have less than a week to get the right meds and save them, once they stop acting fine it'll be too late.
tanksize: ten gallons
Fish: one betta, three harlequin rasboras
Water change schedule: because I'm treating for velvet, roughly about a 50% four days of the week and 25% the other three. (basically every single day I'm doing water changes)
Any ideas what the heck is making them sick, how to cure it (FAST), and (god forbid) if they die, how to go about sanitizing the tank.
help help help help help help help help help pleeeeeasse