06-10-2013, 10:28 PM
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I agree with what's been said. Those angels are either going to need the tank all to themselves (if they are a true mated pair), or a larger tank (somewhere in the range of a 55 gallon). These fish do get quite large, at six inches long and 6-8 inches tall. When they reach full size (or even half size) there is a considerable amount of bioload to consider in a tank that size, on top of having the 8 tetras and 2 ADF.
I once saw a mature angelfish at my LFS and he was bigger than both my hands. They had him in a ten gallon 'display' tank, and he could neither turn around, nor keep his bottom fin from dragging.
I'd recommend rehoming the angels (the rest of your stocking is fine, you could up your neon/rummy numbers if you removed the angels) or getting a larger tank, for the comfort of the angelfish.
I also recommend checking out the site 'aqadvisor', it's basically a calculator that helps guide tank stocking. It's not foolproof, but the majority of the information is accurate and it gives proper warnings and tips, and is a good rough guideline when working out potential stocking.