I have a small 100 gal. pond, and a 5 gal. skipping pouring down into a small stream. The pond has been up and running for about 9 months, always crystal clear, and seamingly very healthy. I currently have two small 4" koi, 3 "fancy" gold fish. Plants include "1 rosa de noche" , 1 "afterglow", 1 "Ted Uber", and 1 "uber ivory" lilly. I also have some Horsetail rush, parrot's feather, pennywort, and miniature sagittaria. Last Thursday I pulled everything out, cleaned 75% of the bottom sediment, fertilized everything, and then placed back into the pond, when I did this, I noticed I had some new additions to the pond, from what I can tell, ther looks to be about 12 new fish, about an inch long, and black in color. I went away for the weekend, and when we got back, there was a fair amount of algae growing in a few of the streams holding areas. I ordered a few floating water hyacinth's today hoping that will help with any algae problems, but I am thinking that because of the new "additions", my water balance is off. Am I overcrowding this small pond? It was very hot here over the weekend (100+) and I do not have much coverage from the lilly pads yet, so I am guessing that this added to the algae bloom, but any advice would be greatly appreciated!
Thanks..
Greg