Dosing 2 part timing?

[I Take Cars]

Quick question, I am wondering how longI should wait between all and ca? Now I do it every 4 hours and 5 minutes between. Is there a better way with reguards to timing between them? TIA

 

[ksc]

I run my dosers at the same time and off the same timer. Calcium into the sump, ALK into the display right on top of an mp40.

 

[morpheas]

There's also this discussion going on about 2 part dosing timing/practices...