infested

Is this a type of flatworm?? My tank is infested with these !!! Should I nuke the tank??? And start over ?? What’s the best method I should do. It’s infested to the point dipping will be no help.

My tank is getting infested with bubble algae!! Seen a few on the pumps and I regret not cleaning it immediately! Now it’s taking over my rocks. I tried scrapping it off but it’s more difficult then I thought it would be. I dose 2x of reflux and did absolutely nothing to the bubble algae...

So all of the frags I received from AquaSD.com are infested with zoanthid eating spiders I have pulled 6 off so far and cut off a bunch of shredded polyps, what should I do? How do I make sure my tank is not infested I have had these frags in my tank for a few weeks and it is a zoanthid dominant...

My buddy just gave me his old AIO Evo. This thing was previously infested with everything in the book... I planned on setting this up as a QT. After a deep scrub... Is it still even worth using as a QT or am I playing with fire?