new tank up and running

[gregzz4]

Definitely deal with the aiptasia the sooner the better, but don't fret it. You've only just begun your journey. Always remember to take your time with everything your tank does, unless there's a life-threatening fish disease

Let it cycle, try killing the pest nems with boiling water or better lemon juice injected directly into their mouths (but only during your tank's daylight hours to avoid daughter cells being released)
If that doesn't work; make sure you have no ammonia and low nitrates, then get a couple peppermint shrimps. They're hungry little guys. And make sure they are true peppermints Lysmata wurdemanni and not camel shrimps Rhynchocinetes durbanensis