It is 2 weeks since I dumped most of my dying plants, and bit the bullet and added Co2 with the remaining 4 healthy plants. This may or may not be relevant, but I mention it anyhow. Now I have an infestation of these small (about 1.5mm long) buggy things. What are they and how do I get rid of them please? I have some issues with the plants, but will post that in the plants forum. Thanks, Elliott.