I really can't go through the loss of another Betta. I don't know how my son will deal with this.
Red was swimming happily this morning when I left the house around 9am. Now at 2pm, he is a light covered fuzz all over.
5.5 gallon tank with a small pump (sponge filter, no carbon). Temp is 78.
I don't have means of testing the water at the moment.
I did call one of the ladies at our local shop - she personally keeps tons of Bettas - she recommended a partial water change (25%), and to treat him with Pimafix.
Any other suggestions? He is very, very sluggish at the moment and I think I'll cry this time if we lose another fish (lost 4 in the last month).