Originally Posted by bigkev
My tank has been running for a little over 4 weeks. 150 gallons. The filter is an old Tidepool 2. Is this OK?
This is no where near ok. How did you cycle this tank? What are your water readings for ammonia, nitrite, nitrate, ph, kh, temp, and SG? You didn't even have time to cycle and you have fish that require huge tanks (the grouper), those that require many lbs of very mature LR (tang), a messy eel. A four week old tank should not have one fish yet. I am sorry, but why didn't you ask for help sooner? You did not do any research did you. Please don't turn away, we can help but you are in a bind here. Most of your fish need new homes.