I think I am overstocked...

The facts:
72 gallon bowfront
2 aquaclear 70-90 filters (I AM getting a rena filter and a skimmer within a month, waiting on my lfs stock to arrive)
3 power heads (794 gph flow ~also another 400gph powerhead ordered on lfs stock)
50 lbs aragonite
65 lbs live rock (planning to double that amount)

The coral:
50-60 mushroom polyps
1 colt coral
1 open brain coral
1 bubble coral
1 favite brain
1 devils hand leather
1 frogspawn
1 galaxy coral

The fish (here's the overkill)
1 copperband butterfly (doing AWSOME-eats like a pig)
2 bartlett anthias male/female (pretty sure thats where the unidentified babies came from)
2 banggai cardinals
1 yellow tang
1 clown (planning on a second for the pair)
1 cleaner wrasse
1 watchman goby
1 engineer goby
1 yellow wrasse

planning on 2 cleaner shrimp to replace the 2 I just lost.

ok, lemme have it.
How bad is it? I was doing a 10 gallon change every 10 days, but since upgrading to the 72 I may make the changes bigger. I don't plan on any more fish (although there is this yellow eyed kole tang?....ehem, sorry...)

I think you should be fine with what you have. You have a lot of flow going through that tank. The main thing is protien skimming and filter maintainence. You really need to be cleaning your canister filters at least once a week. If you don't things can go downhill fast. You have tons of rock which is good. Are you experiencing any problems as of now?

Well you have quite a few fish in your 72. But if Biff can have what was it 13 in a 55 then you should be able to handle 11. But seriously though I think you may be pushing it a little bit. But if you keep doing water changes and get a very good skimmer you should be alright.

the only problem I consistently have is the presence of phosphate. It's been an ongoing battle with phosphate removing media in the filter and making sure not to over feed.
nitrate, nitrite and ammonia are all nil.
And I do clean out the filters weekly...well actually its more life every 10 days. I rinse it all out during my water change.

If your water quality is staying good and your fish aren't fighting, then you are okay. I had 13 fish in my 55, but was constantly battling nitrates. Let your water quality and your fish's health be the guide when you are stocking.

I think your borderline.Of course the tang will eventually out your 72.

I expect he will but, some of what I have read have said minimum 70 gallon tank requirement..one site even said a 50 gallon minimum. Either way I plan on a 120 in a year or so, That will be my last upgrade..or so, I've told my husband

Thanks Biff, my water quality is great except the phosphates. They aren't high, but they are ever present.

I think you're OK. Te bigger issue for me would be territory over water quality, because you can just do more water changes to keep that flow of fresh water coming. But not much you can do if the fish start killing each other over territory.

I think 11 is fine tho.

i think you are fine look into a phosban reactor