Hello, I have been building new setup and it's finally finished. I have a few questions. My current 55g tank has no sump or refugium so I'm new to the sump thing. New system has 40 breeder diy sump with refugium. Any thoughts on best refugium substrate?
Should I reuse all the tank substrate or just a small "seeding" and replace the rest?
I've been working on this for at least 6 months and now that the time has arrived I'm a little freaked out [emoji51]
Thanks