ok i know proteins skimmers have reduced efficency in fresh water. i am curious as how they work on high organic system, such as ponds, goldfish or predator tanks. i see pond ones for sale, that look like basic old fashion marine ones like 10 years ago. TMC: Commercial - Freshwater & Pond Protein Skimmers im just trying to get some feedback on how well they work and how well you would think a cheap marine one might work like a octopus or coralife(I cant believe i sold my coralife before trying this, im kicking my self). anyway i think im convinced they will work on a dirty fresh system. due to the fact my coralife would skim some stuff in a fresh and vinegar bath(i already checked vinegar doesnt bubble like soap).