Originally Posted by LebronTheBetta
Okay, so you're treating him with ES? Good, I recommend Hydor THEO heaters as I have 2 with tanks above 10G and below.. It's adjustable and looks great, too. Pimafix has an ingredient called "tea tree oil" which can coat his labyrinth and suffocate his need for air from the surface. And med with -fix has this so please don't use it. I don't think you need it anyway.
I went out a few days ago and got Aqueon adjustable 50w for the tanks. So far they've been working great (temp in Drift's home tank is now 78*f) and the bettas actually like sleeping on the suction cups.
As for the Pimafix...I bought it for when my very first apple snail had a fungal infection a while back. If I'd known about the oil beforehand i would have never
used it in the tank. Thanks for the warning.