I tried some API root tabs last week. I think the package said that 6 tablets would treat 10 gallons. So, math would tell me I should use 24 to treat a 40 gallon, right? Maybe so, but something went wrong. I had finally gotten the tank clean again with very little green algae to speak of... still some lingering black (algae I assume) on the plants, but over all.. was much better. After putting in 20 (not 24) API root tabs in the evening, I came home the next day after work to a tank with cloudy water and new algae that quickly swept across the tank. I don't know what in the world I did wrong, but I got it cleaned up again and started my new regimen of ferts.
Thanks to some great advice from Rivercats, I have started using the PPS method of fertilization with dry ferts from Green Leaf Aquariums. I am also using a very slight overdose of Flourish Excel daily.
I also FINALLY found a perfect piece of driftwood to add to the tank that will look really great. Right now I've got it soaking in RO water to pull out any tannins and saturate it so it won't float. I don't want to weight it down with slate or anything.
So... by this weekend, I should be able to get that driftwood in and do a "remodel" of existing hardscape. Once I've done that, I will order some new plants to go along with the existing ones that will help accent and provide depth.
Anyway - I'm extremely excited to start this new product and get this tank to where I would like to see it.
Thanks to EVERYBODY who offered advice. I look forward to continuing to learn more and more from you. Rivercats has been especially helpful and I thank you for that.
BTW, I understand that adding driftwood will change my water a bit. If I understand right, It will reduce my pH and possibly soften the water. Is this true? If so, how quickly does that happen?