Nice pond, but the bioload is huge. More feeding plus waste generation = High nitrates and algal bloom. You should reduce the number of koi, remove the male koi so that there's no procreation. Also add a male Sunfish that'd kill tadpoles and frys. Good luck 👍
The 70 gallon is awesome the kids must love it. The discus are the highlight I’d say. Hopefully you can get someone to do the needed maintenance on the pond soon. The color on those Brazil oscars are unbelievable.
