ph probe – in the reactor or in the sump or in the tank

so i got a new calcium reactor (woo hooo), i know its only a coralife 250 gal calcium reactor – but for now it will help me to get started. so i’m here again looking for your opinion/help/ideas that will help me setup my calcium reactor.

so far i have the following:

- argonite
-coralife calcium reactor 250 gal
-apex controller (i highly recommend this baby over RKE from DA – if you have questions why.. just ask me i can give you a list) – that will help me controll ph.
-20lbs co2 tank
-regulator with solenoid.

-here’s some questions:
- what else am i missing?
- should i place the ph probe : inside the tank? or within the reactor? or in my sump?

please be aware that i’m still new at this so please make the comments – plain english..

thanks for your comments/help/ideas -

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