I have a 2 pond water feature. The main pond is 2000 gal oval 18" deep. Above that is a smaller pond about 400 gal with a water fall to the large pond. There is no skimmer, no bottom drain. No filtration. The pool man takes care of cleaning it. Right now there is a submersible pump returning the water to the small upper pond. What's the minimum I would need to do to introduce fish to the lower pond.
Thanks
Thanks