Maybe a random question. Initially when my parents bought their first koi, they used a 250 gallon horse trough that had been converted into a fish 'pond' (sealing the metal with liner, etc.) Now we are going to build a 500 gallon pond that will simply be for goldfish.
But I'm trying to figure out really what to do with the thing. My parents spent a good deal on it and on the liner and all. So I'm trying to figure out some kind of use. How big are sump filters supposed to be compared to the size of the pond/tank? What if this was used to make a sump filter for the goldfish pond--is a 250 gallon filter maybe a little over kill for a 500 gallon pond? LOL!
I was thinking turtle or fancy goldfish--but for a turtle I'd honestly like to see them from the side instead of just above, and I don't know if I could support fancies outdoors and this isn't exactly an indoor tank.
If you had a big, long 0 shaped 'pond'/tank where you can't see through the sides that is only 250 gallons, what would you do with it?