Mine are now feeding 3 times a day on the pellets.
They work as a pack and smash them. It's cool to see.
I am now dealing with murky water. Brownish.
If I had the cash I'd buy a few more plants, chemical treatments and an aerator, but sadly not atm.
There was a layer of silt, built up over 6 years, which didn't seem a problem with the goldfish, but the Koi seem to be churning up, along with Canadian weed that was just coming up.
After a bit of searching, im trying 20mm shingle just overlaid.
I have a small 5in1 submersible Blagdon pump and with cleaning the filters out every couple of days, I appear to be getting slightly clearer water.