DIY co2 Questions for a 10 Gallon

I'm pondering setting up a DIY co2 system for my 10 gallon to get the plants growing a bit faster, but I do have some concerns/questions. For background, I have 20 watts of CF lighting and dose Flourish, Nitrogen, Phosphorous, and Potassium daily. KH is 8 and pH is 7.6.

If I set up co2 for a couple of months, and decide to stop, is this going to cause trouble (aside from decreased plant growth)? My plants are doing fine without co2 at the moment, just growing slowly (no significant algae present).

How does one control the amount of co2 entering the tank in one of these DIY setups? My plan would be to use a 20 oz soda bottle for the yeast, with a bubble counter from an IV set drilled to the cap and sealed with silcone, then some airline with the IV flow switch, then a check valve, and more airline to an airstone in the tank. Is this the right kind of set-up? Would the flow switch from the IV set be enough to regulate the co2 allowed into the tank, or would the pressure just force it through anyway (all the flow switch does is clamp the airline to varying degrees)?

From what I've read excel tends to melt anacharis, so I'm afraid to try it. :huh: That would be the easy way to go though. Maybe I could transfer a few stems of anacharis and try it in my 5 gallon first and see how they fair.

That sounds like a setup I could use. I can hide the smaller bottles behind the tank, but there is no room on the stand for 2L bottles.

I'm trying to increase growth now by adding a bit more phosphate, as I suspect I may have a deficiency going on (tap water has no measureable amount). All the plants look great, growth just slowed to a crawl. Nitrates test in the 10-15 ppm range. My initial fertilization method was several root tabs and the plants grew like crazy the first 4 weeks or so. Growth slowed, so I started supplementing Flourish, Nitrogen, Potassium, and Phosphorous at the recommended doses on the bottle. I was trying to figure out what the root tabs had that my current ferts don't, and I realized the tabs are usually pretty high in phosphate. Just in one day of adding more phosphorous the anacharis growth seems to have increased.

If this added phosphorous doesn't continue to work or if I run into algae, I'll try the CO2. Thanks again for the suggestions!