Frag Tank questions and photos

[Steverd]

I've had this low boy frag tank running for almost a year now and have a few questions.
Mostly a Zoanthid Frag tank and there are only three small fish in this tank.

Photo1: What is your thoughts on the live rock in the frag tank? Helpful or wasting space that I could be using for more frags.
Photo2: I think my refugium might be over loaded. I have MarinePure cubes on the bottom, live rock on top of that and then Chaeto on top of that. Also MarinePure Plate between the refugium and return section. Is that too much?

I keep the tank clean but Nitrates do stay between 10-20ppm, The Zoas are growing fast and the few SPS frags are encrusting the frag plugs.

If I remove the Rock from the tank I would have more frag room, but will that raise my nitrates even higher?
But I think my refugium might be the nitrate trap, what If I remove everything in it and put in two Marinepure bricks and keep the Chaeto, it's growing fast.

I need some advice, feedback and direction please!

 

[Steverd]

SO any thoughts if the Live rock is overkill.
Or Thoughts on the Refugium?
THANK YOU

 

[joseserrano]

You can remove a little at a time and track waste levels. Easy way to get your answer

 

[kireek]

I think the tank looks good.Maybe you could turn your skimmer up a bit.Also I am not familiar with the Marine pure blocks you are using.Is it possible that they are collecting detritus? Prehaps they could be rearranged to allow for easier removal of sediment during water changes.