I have a new pond in Michigan that I just began to stock this spring. ( 25 cats, 100 perch, and 3gallons of fatheads which have really multiplied) and I am having an outbreak of filamentaous algae and something else I can't identify. I previously posted the unknown in another section under "White Film". Anyhow I purchased some cutrine plus to treat the algae and had my water tested for hardness before I applied it. The test came back twice as 272 ppm. I know this is extrememly high and would like to know if I need to be concerened about "fish kill". The white film is still an unknow. I can get rid of it for about a day by screening but it comes right back and after a day or two it starts to look green. It is like the algae is attaching itself to whatever is floating. It appears to be very slimy in texture cause when I agitate the water it creates large bubbles that don't go away right away. The pond is 1/3 of an acre in size, about 12 feet deep uniformly with aerators running 24/7. Should I treat it with Cutrine or is their some way to bring down the Hardness? Pictures can be seen at Fozzys Photos

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