Hey to all! I am new to forum and a 2yr. old in watergardening. I test drive for a living and do drive instruction for Aston Martin. I have 4 koi and 12 gold fish (former feeder test fish, lost none so they stay). I have water lettuce, water hyicinh, and a lone lilly. 3000 gallon rubber lined pond The pond is in cased with concrete reinforced with 1/2 x1/2 hardware wire (we have gophers). I have a 13ft long 4ft gradual drop water course. two Laguna sub pumps 4200, 2900 gph. Viaaqua uv sterilizer. Underwater LED spots (2), and 6 Blue underwaterfall LEDs.