How much mud do I need?

shockwave00

Member
Hi All,
I have a reef tank with some fish and was looking at my refugium and I believe I need more mud in there? I'm not sure if I add sand or sand and mud or what? I have about 1.5 inches of it inside my tank right now.. How many inches should I have? My tank is 150gal. I did see some mud which is called walts FIJI mud or something but I am not sure if that is the right stuff and how much I need to put in there! Please help with what to do.
Thanks for your help!
 
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