Clown swims to top of the tank poking his head above water and darting back and forth repeatedly when I open the lid of my 32g biocube.

[Ziggy17]

Tank is cycled and why do you think otherwise?
Did I miss something?

sometimes new tanks will go back into a cycle.

 

[Dburr1014]

sometimes new tanks will go back into a cycle.

Maybe if you add to many fish at once.
We are talking 2 clowns.
I really don't forsee that happening.

 

[twentyleagues]

sometimes new tanks will go back into a cycle.

Maybe if it was dry rock and you over load the system.....maybe. This was live sand live rock with not very much bio load, not the case.

 

[Brit’s Fish]

i am 100% sure he looking for food, clowns are PIGS, both of my clowns swim straight to the top of the tank ANYTIME i walk by. "MINE MINE MINE MINE"

I always think of the seagulls from Finding Nemo when I’m feeding the fish.

 

[Brit’s Fish]

My tank is about a month old with two clown fish and a cleaner shrimp. One is a larger maroon, and the other a small Percula. They have always got along fine but oddly enough the small percula is far more active. Recently when opening the tank the percula swims to the top almost as if it wants to jump at me for invading his territory. At first I thought they were hungry but he didn't even care about the food until I put the lid back down and repeats everytime i lift it. Immediately after walking away he goes back to normal... is this normal? I also just read that maroon are aggressive and there might be a problem down the line which is annoying because my reef shop said they would be fine.

This seems like normal territorial clown behavior to me. One of my MochaVincis practically launches herself out of the tank trying to bite me, especially when they have a clutch of eggs. I would seriously rethink mixing the two clowns you have though. If the other one is really a maroon, they get very big and very mean. I’m sorry that your LFS misled you and honestly, I would speak with them about it if I were you.