cure

i found a cool piece of driftwood i want to use in my planted tank. How do you cure driftwood to make it sink and be safe for the fish? is honeysuckle okay for fish? thats the kind i found.

Are there any diseases/parasites that cannot be solved with epsom salt and high temperature? (ex: fin rot, tapeworms, hookworms, ick, HITH/hole in the head disease, dropsy, bloat, etc.)

What ever I do my Arowana keeps getting white line on its eye then I use penicillin to cure but keeps returning after several days. Need help thanks

Yesterday I noticed white dots on my black Platy, however I don't think it's whitespot, because it looks as if it's not on the skin, it's like, hanging on, I don't know. It's eye has a white coat and the white things are as I said, not in the skin, but on it. I looked it up and I found something...