I was sooooo tempted to sneak that out of the sump & into my CRV on my last visit. Good thing I cut off my pinky tip 

 & couldn't get my hands wet
 
Glad this big purchase worked out so well for you. Now you can hook up the big CO2 tank to your Ca reactor again. I guess your tank had reached critical mass in terms of nutrient bioload when you had those problems (before the BK).
 
Anthony