Hey all. New to this forum and new to ponds. Our family recently moved into a bigger house and it hapened to have a nice sized pond with a bridge over it. The pond is about 8'x3ft and its deepest part is probably around 4ft. The filtration is as follows: Some sort of rock filter in the deep part of the pond, a tetrapond canister filter, and a big tub of pumice stone that the water gets put through after the other two filters. It seems like a nice setup. My problem is algae. The pond is full of it. Stringy algae everywhere. Theres also alot of insects in the pond. I have been dosing it with Algaefix for a while and its done little for it. How would I go about getting my pond ready for Koi this april? I've heard of mosquito fish that will take care of the insect problem, has anyone had success with them? Any input is appreciated, thanks!