Folks, if you've recently upgraded or renewed your annual club membership but it's still not active, please reach out to the BOD or a moderator. The PayPal system has a slight bug which it doesn't allow it to activate the account on it's own.
Any controller is a good investment.
Do you have a sump to run bigger fans in?
Top Off unit is a big help. You can also mix Kalk in the top off. Let it settle and use the clear water for topping off. This way you wouldn't need a Calc or Kalk reactor.