Join Date: Jan 2007
Location: "Swamptown", SC
Um that could be something completely different, everything that was in my tank were moving, and hydra would be attaching itself to tank occupants I think. However, from what I know, flatworms inhabit freshwater as well, I've actually seen some of these plant leeches on store bought plants, and they can be rather big (size of a pea). Anyway as far as surface agitation, it depends on what you have, if you're using CO2 then that might be a problem, but if your dosing with flourish excel then that shouldn't be a problem. With an open topped aquarium, some of the surface agitation might cause splashing depending on what you use. A minimum will also introduce more oxygen exchange in the water, so it isn't necessarily a bad idea, of course I could be wrong, but it never seemed to hurt any of my tanks that had a lot of plants. It will help keep that slick off and allow more light to reach your plants. However, if the agitation is too great it could deflect too much light. I guess what I'm trying to get at is there can be too much agitation, but a little bit will not hurt anything, at least not to my knowledge...