Weekly excel dosing or DIY CO2
Does anyone have experience with dosing excel on a weekly basis? I have a low tech 37 gallon, and I would like to start dosing excel for a small bit more growth and healthier plants, but I dose only once per week and I can't change that. Is it beneficial to dose excel in small amounts only once per week in a low tech tank?
I just had another thought. Would DIY co2 be better than excel? I figure I could do 2-2 liter bottles or something similar and replace one per week. What are the advantages and disadvantages in a low tech tank of diy co2 vs excel? Would two 2 liter bottles get enough co2 into a 37 gallon tank with a canister filter setup to create a little surface agitation (I have it this way to take care of surface scum)?
Right now I seem to have a very stable system with very little algae and part of me thinks I should just leave it alone. Would adding diy co2 or excel upset my balance?