i've put the algafix in pond three times now and it looks really good . algae is not growing like it had been but it's a little soon to contribute that to the chemical . each time i've put it in , the pond has gotten a strange clear scum on it which is pretty much gone after about a day [ no i don't know where it has gone to ] . we have some very light colored gravel in the shallow , plant containing area and it has looked bad enough that i've thought of replacing it with something darker . it looked better after one application and now looks really nice , the best it has looked in a couple years . i would recommend this product if asked about it . fish are fine , plants seem to be fine but again a little soon to judge affect on plants . again i need to point out i've been using roughly half recommended dosage . hope mentioning a product isn't breaking forum rules , i just thought someone might find this helpful . . . peace..........ps . ''twovetts'' just left for alaska , i'm lonesome already .