phosban reactor and alk/ph

[TR3XX]

I installed a TLF Phosban Reactor 150 using 250ml of ROWAPhos as the media. I noticed there is a drop in alk and ph and was wondering how long does it usually take to stabilize?

 

I've been testing my alk every 3 hours and adding alk supplements accordingly.

 

Are there any other precautions I need to consider at this time?

 

Thanks!