Question before ordering

[philips]

Hi Rob,

I have fews question about Calcium and Alkalinity follow link, can them work with your controller;

• Alkalinity http://www.coralvue.com/kh-guardian-alkalinity-monitor
  
• Vernier Calcium probe https://www.vernier.com/manuals/ca-bta/#section2
  
• or Synaptic Calcium probe http://www.synapticsensors.com/calcium-i...-any-meter
  

Happy new year!