when i acquired my 75 gallon tank from my friend he also gave me his 20 gallons sump with refugium. i put it under the tank and now about 3 months later the algae that was originally growing in it is growing back nicely. i haven't touched it or disturbed it in anyway and don't really plan to but the glass is covered in algae and i am not sure do i put snails and hermit crabs in their? or do i just leave it be. i have a lot of snails in my DT that i can transfer down their but just wasn't sure if i was suppose to have that kind of stuff in their. thanks for the help.



