K1 or K2

[Tecdiverfl]

I am looking for a stirrer for new 300 gallon. Tank will be mostly sps and wondering if the K2 is overkill? Will the K2 allow me to go longer before refilling kalk?

 

[Avast Marine]

It really depends on evaporation. Any more than 5 gallons a day and I would go with the K2. I used a K1 on my 600g system for several years with 10 gallons a day evaporation and it worked just fine, but it required more frequent refilling.