Well I guess I can understand why no one likes them then. I'm gonna go with trigger on this try a trigger or convince your dad to get rid of him. You could also try a snowflake eel he might eat the little guy for you
Then you might be ok depending on how much live rock you get and how you plan to stock it. Well I'd take it off the filter and use it for surface agitation.
It's been up for about 3 weeks I ran the filter on my DT for a week and used about 15lbs of rock from DT to start the cycle I also used my DT water to fill it.