I have a big problem with Hair Algae, as well as other algae. I've cut back on the lights and got a new 17 w bulb to replace the old 20 w I had in there. I've seen API Algaefix and Tetra Algae control, as well as Seachem Excel. Each one says it won't harm plants or fish. I can't affort $72 for the Excel. Do the other products work without harming plants or fish? I have 4 big Mystery Snails but they don't control it well. I also have Kuhlis, Corys, Neons, White Clouds and Zebra Danios in a 30 gallon tank. Plants in the tank are Amazon Sword, Wisteria and Java Fern.