Thanks for the great information guys, I have PM'd a couple of you about parts and getting set up.
I just wanted to say something about the undergravel comment. Other than my last 7 year break from the hobby/business, I have had tanks for about 30 years. I remember the box filter days with carbon on the bottom and floss on the top.
Granted some of the canister filters are great but.. I am sorry, you really don't need them and you really do not benefit from them. In my holding facility we were using sponge tubes about 8 inches long that were simply inserted into a cosmetic jar that was filled with shell grit and an airstone. These home-made filters workd fine in a 50 gallon holding tank with 2000 tetras, add another if the fish were a bit bigger.
Same goes with undergravels.. talk about simple and effective. The commercial design we had for large tank bays was a 160 gallon tank that had a 4 inch sump with 15 inches of bioballs on the top. Insanely effective biological filter. It worked the same way as an undergravel did.
Granted an Ehiem is a nice filter but totally not necessary, especially in a planted tank with 20 inch long fish and a few shrimp. I see that as a waste of money.
Now I am not trying to argue if a planted tank should or should not use an undergravel but I would like to toss this out for consideration.
If all you were cultivating were java ferns and mosses and perhaps a small foreground plant that would never sink roots deeper than 2-3 inches... and you had 3-4 inches of substrate like the clay from Seachem.. Then what honestly would be the problem with an undergravel? They do keep the substrate form going anerobic and I would think this would aid in the healthy breakdown of wastes and be beneficial to shallow rooted plants.
I think sometimes we think "basic" does not work well. But just like these regulators, you do not need the word "fluval" on it to have a really high quality product that delivers the gas you need in the amount you need..
Just my two cents on the filtration issue... Thanks for reading