DT's Live Phytoplankton

[Delphinus]

Dosage is dependent really on what you have that eats it. With a 20g, you're not going to need a lot at all. Bear in mind that most corals we keep are not direct consumers of phytoplankton (which is what DT's is) so they're not actually eating the stuff. One exception is there are some gorgonians that feed on phyto. Clams are the real big consumer of phyto but there is some debate as to whether you really "need" to feed phyto to clams. So in the case of DT's and "how does this help my tank" .. you put small amounts in your tank, thus feeding phytoplankton which in turn are fed upon by other tankmates. In the case of a 20g I don't think you need more than a capful every 3-4 days. Too much more than that and I think you risk spiking your system.