any aquarists here? I need some help...

[Bolisnide]

Hey Cris, thanks! I was only thinking of getting one or the other, and of course just one of what we decide on...
But, on my other thread in aquatic frogs, I was told the gravel is bad for adf's, so we may just go with a male betta. I am not taking all of my gravel out, don't have time, and too much work!
I have been reading up on both adf's and bettas, and do bettas require aquarium salt for health? Would that affect the health of my plants?

[irThumper]

Pardon the brief hijack but I have a question that is sort of aquarist related. I just purchased a 2nd hand 5 gallon tank from Goodwill and noticed the caulking is stained greenish... I soaked the thing in super hot tap water and 10% bleach. Afterwards I dried it with paper towels and this green stuff (malachite green maybe??) is STILL coming off on the paper towels, but is also still in the caulking. Is it safe to use this tank for a hospital enclosure for frogs or should I skip it?