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[ychall]

Hi - I have been growing Phalaenopsis orchids for the last few years. At first I put them near windows but didn't have much luck with blooms. Then I set up a table and hung led grow lights over it. They bloomed almost constantly at first but had purple leaves. Research said it was from too much light.
Have raised the lights a couple of times until leaves are now green. Fought off a spider mite infestation and repotted. Doing okay but not great. I do have algae growing on the planting medium. Tried Physan 20 and Hydrogen Peroxide to no avail. Would something designed to keep birdbaths clear work without hurting the plants? Description says it won't hurt the birds.