You can try it, but I did that for two months and it had no appreciable effect, and isn't cheap.Physical removal is your best bet, and removing the nutrients that are feeding it's growth. I'd cut back your light schedule a bit. The most likely culprit is that they were overfeeding the tank.
+1 mag spike did nothing for me. Spray bottle with H2O2, increased water changes, added GFO, limit feedings and a algae scrubber did the trick for me.
You got to get the algae out and get ahead of the po and nutrents
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