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Neptune Systems AquaController Apex Lite, with Display, 2 Temp Probe, 2 EnergyBar 8, Pm2 module wxm module system a year old works great. I do have the ph and salinity probes but they are about a year old also $400
yes it will be $45 not sure about the salinity probe it is about 10 months old and I have no payed much attention to it fo awhile and yes it needs its own temp probe if you want the temp probe t will be another $5