Thought I could contribute something to the site. I have a tank for my eels. Was an old bait tank for killies and shiners, but my fish kept dying because of ammonia issues. I got a pond filter, which helped, but the real issue was fresh water.

I plumbed out a separate line to give instant access for the water. Set up another drain line in my basement to take the waste water out. Real pita, but I had some sump pump work I was doing there anyway, so I tied it in.

I'll set up a step-by-step for anyone else who wants to make an eel tank. Keep in mind there are many different ways to do this, so take what you want from this. I will say I have been able to keep eels alive for weeks with this setup, so I'm gonna stick with it.

And y'all know eels are striper candy.