I have a 29 gallon reef tank and 96w of T5 lights. I have (now this is a just a guess) about 200 baby snails ranging from the grain of salt to the size of sprinkle. I dont know where they came from but there are tons!! I also have a ton of scypha sponges, probably twice as many of them then snails! Also, I have just as many of these little white swirl looking things. I think they are some type of tube worm. I am wondering if all of these things are good or bad, and if they are bad what could I do to get rid of them? Thank you!