CorallineAlgae
Aquarium Advice Addict
How you setup your co2 system is really important when fighting BBA. Simply having it turn on with the lights isn't nearly as effective as turning it on a couple of hours before the lights. You really want the co2 to be built up before the lights first come on. Having the co2 level at full strength each morning is key.
Also, at least with some water systems, it's beneficial to mix RO water with your tap water and even use RO for top off.
Another thing to consider is you won't be saving much money on Excel until your BBA is gone for a while. You're still going to want to use it for spot treatment even with a co2 system. Once the algae is beaten and you don't need Excel, though, your co2 will start to pay for itself.
Also, at least with some water systems, it's beneficial to mix RO water with your tap water and even use RO for top off.
Another thing to consider is you won't be saving much money on Excel until your BBA is gone for a while. You're still going to want to use it for spot treatment even with a co2 system. Once the algae is beaten and you don't need Excel, though, your co2 will start to pay for itself.