I know this is a salt water forum, but I also have a 10 gallon fresh water tank with 5 neon tetras in it. Lately I've been having problems with green algae (the kind that looks greenish-blue). I'm wondering if it is from adding too much aquarium salt. There is about a single shot glass full of aquarium salt in the tank. Just wondering if anyone has ideas on keeping that algae from forming so abundantly on my gravel. Thanks!