Planted Tank Guru
Join Date: Jan 2010
Location: Contra Costa CA
Keep it simple. As you move plants around the complex layers get all mixed.
If you want peat moss, go ahead and mix it in, or use just a dusting on the bottom of the tank.
Put Osmocote pellets on the bottom of the tank. (so far you would still be able to see the glass with peat and Osmocote)
Then put the material the plants will root in. 2" is fine for most plants, 3" is getting a bit deep, though if you want hills and valleys the hills will probably end up even higher.
Mineralized top soil is one option, as long as you do not have digging fish.
Turface is a very good option for a soft water tank, and has high cationic exchange capacity, so is very good for holding fertilizers for the roots.
Eco Complete, Flourite and other commercial substrates are also good, though a bit more expensive.
You can cap mineralized top soil with pool filter sand, or fine gravel.
Turface is so light that capping it usually does not work. The cap material sifts through it no matter what you use. I use it without capping it.
A mated pair of Angels are likely to claim all of a 4' long tank, so just one pair.
Other fish should be compatible with the needs of the Angels: Warm water (uppermost 70s to low 80s) and very soft (especially if you go with wild caught.)
If you want some unusual fish look into Anostomus (a couple of species, one is a loner, the other is social), Sturisoma (several species, S. nigrirostris is the best for the warmest water), Diamond Tetras. Bristlenose Pleco for alage clean up.
What are your tap water parameters? Will you need to use RO to get the water as soft as you need it?