If you have any LPS corals, then chances are you have heard about the infamous brown jelly. This dark substance, as its name implies, is a brown gelatinous goo that forms on some corals, eventually causing total death of the colony or frag. While this in itself is disturbing enough, the jelly doesn’t stop at just one victim. Usually any corals downstream of the infected coral will also become jelly infested, causing an intense cycle of death that affect nearly everything in the tank. The only way to solve the brown jelly problem is aggressive fragging and removal of the infected tissue, and totally remind the coral from the system helps too. It’s not an un-winnable battle, but it is certainly a tough one.