LF a PH monitor

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Looking for something to monitor PH in my tank. Tired of using test kits. I have a RKL, but could be persuaded to buy an RKE if you've got one for sale.

Let me know here, or in PM.

 

[bwhit1406]

Why not just buy the probe module for the RKL?

 

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Well that's why I'm asking here, I would like one but they're kind of hard to come by.. I would, rather buy the SL2 module here rather than BRS or DA themselves, because if i'm buying it retail the SL module, and the probe, you're at $120 or so, plus shipping. I can get an RKE system with a systems lab module used for $200 or so, and I could sell my RKL for $50-75.. Just doesn't make sense to me to do that.