This tank will actually be for two male betta splendens, but since this is the only aquatic plant section here goes.

The plants I would like to use are dwarf hairgrass for the foreground, heteranthera zosterifolia for the back ground and broad leaf saggitaria in the middle.

The tank will be a regular glass 10 gallon. For lighting I will use 2 Coralife Mini Freshwater Aqualights that include 2 9 watt 6700k lamps each. This would give me 3.6 watts/gallon. For subtrate I would like to use Carib Sea Eco Complete. I'll be using two sponge filters and a Hydor Theo 50 watt heater. I'll also be supplementing with Seachem Flourish and Flourish Excel.

My water is quite hard with a GH of 150 ppm, KH 180 ppm and pH out of tap at 7.4. The pH, once it's been aerated and added to my 55 gall., reads 8.0, so I think I have a lot of dissolved CO2 in my tap water.

Will I be able to get away with no CO2? Do you reccomend I use different plants? Do you reccomend a different subtrate or additives? What do you guys think?

Check out the following websites and their forums:

www.plantedtank.net
www.aquaticplantcentral.com

Lots of really smart people on those websites and they will give you some very precise information.

Two male bettas in the same tank??? Are you planning on using a tank divider? If you don't they will proably fight to the death, as that is their nature.

Your setup looks well planned, just remember to dose the Flourish according to how much plant mass you have in the tank. You can always cut the hardness of your water by using distilled water. On a 10g tank you could use Hagen's Natural Plant System or DIY CO2 (both covered extensively at the above websites). Pressurized CO2 is probably overkill, but is so much more convenient than changing the yeast mixture and has a higher initial cost. I would just see what kind of results you get using the Excel, if you are satisfied with those results by all means keep on using it. Speaking from experience, you will be amazed at the difference in growth when you start dissolving CO2 gas into your water either from low or high pressure systems.

Another piece of advice, learn to live with algae as you will undoubtedly be plagued by it in the early stages of your tank!

Let us know what you decide on !!!!