google aiptasia, they are very common and is more than likely what you got on your LR. Peppermint shrimp are known to eat them. They also make chemicals that will murder em.
I am pretty sure that the tank is a standard 29 gallon (30x18x12). I am going to be keeping mainly softies and possibly try some of the easier LPS and SPS in the future. I think the K3's may be a bit of overkill for my setup right now...unless I upgrade that is Thanks!
If you know the motor itself still works you can just buy a replacement impeller and save a couple dollars to put to another skimmer. Just google Red Sea Prizm replacement pump and it should bring up several options.