My jellyfish keep shrinking

[Marcifrank]

I bought a jellyfish tank. I'm feeding them correctly and all of the parameters are fine. They keep shrinking until they disappear? Any advice. I have moon jellyfish Are there hardier ones?

 

[Daniel@R2R Verified Admin]

Man, jellies are hard to keep.

 

[A Toadstool Leather]

Moon jellies are the most hardy and easy to keep. What kind of tank are they in? Did you cycle the tank before?