api stress coat

I have read the Forum on the Q & A of tetra safestart but I have a few questions. So I used tetra safestart one week ago and put in two zebra danios to cycle the tank (10 gal). Once the tank is cycled I was be giving the danios to a friend at work, and putting my betta fish in (I used other fish...

I too was unfortunately misinformed by my LFS that bettas prefer small cubes and require very little maintenance. I walked out of the store with 3 bettas and 3 one-gallon cubes. It took less than 24 hours of watching them to realize they would be happier in something larger. Fast forward to...

I did a 25% water change in my tank and treated the new water with stress coat for the first time. Came back a few hours later and the top of the tank/filter was frothy and bubbly like soap. I've also been treating with tetracycline for a few days but this didn't happen until adding the stress...

Recently, like the couple weeks my fish has been staying on top of the later and can't seem to swim down to the bottom of his tank, or even try. He also just floats back up without actually swimming. From what I've learned so far, this is SBD? I don't know how to go about treating this though...