RED BUGS! Aaaawwww that sucks, ya I have talked with peeps that have used heart worm medication for dogs. They said it worked well, but no first hand experiences with them there nasty little critters. If I was you, I would talk with Erick @ Clarks he is very knowledgeable when it comes to pests in the tank. Got to go I need to check my tank, all this talk is making me nerves. late