Dosing Pump

[JAHGYDI]

they have versions of the ghl that dont need controllers

[davocean]

I was going to say I'd jump on Justins drews dosers(sdfishman)
They can't even keep these in stock people love them so much.
Get the pair, and 2 digital timers and you are set.
I've seen way too many exp reefers switch to dosers for 2 part and kalkwasser to take place of cal reactors.
Seems to be the positive/safer way to go.