Hi again everyone. You all have been extremely helpful to me recently and I have greatly appreciated it. I am having another issue that has started to happen since about last week. I noticed small creatures jumping around in my 2.5 gallon ramshorn snail tank, at first I wasn't sure what they were but I did some research and they look to be copepods. I am concerned because I plan to transfer some snails out of this tank into another and I don't want to transfer the copepods with them. I read that doing frequent water changes can help, which I have been doing for about a week now. About 50% water changes every day and it doesn't seem to control them. Starting to see a few of them getting larger and definitely see the copepod features clearly now. I read on another forum that a UV-C sterilizer could be used, I like this idea but since I'm dealing with such a small tank, the options I see are for very large systems it seems. Does anyone have any recommendation for an external system with small diameter hoses? I figure I can probably pump water through it temporarily for a while until they disappear. Thanks everyone!