hello everyone, i have a 150 gallon tank which i have set up and running for over 6 months now so i believe it is stabalized. i have a sump with two compartments that came with the tank and i wanted to make one of the compartments a refugium. my question is if it is ok to use marine mud and live sand together, or since i already have live sand in the tank to just use live sand in the refugium. this is also my first time setting up a sump so please if you have any helpful tips, i would appreciate it.