Water Gardening: Hydrogen Peroxide, 1 by MG99

MG99 wrote:
Thanks for the advice in this thread. The lotus is the reason why we got a 250 gal pond 3 weeks ago.

I too am having a problem with green algae. Not stringy that I've noticed, but green water and slime on the sides. I got some 'trapdoor' snails, and have 4 gold fish. I did go and get a passive filter with some kind of cardboard like filler, and added some 'crystal waters' 1/2 oz to 250 g. This and the filter were added last wekend, and there's no difference.

My question, would a passive filter of barley work well enough, or whoudl I get an active filter, or is there liquid barley?

The deck is on our covered deck, but it hot on there, ~ 95F and bright indirect sunlight.