I bought an Apex for my new tank. But, there are a few other options...
- There's GHL. Looks like it's basically the same price.
- There's CoralVue HYDROS Control 4. This is brand new. It's a fair bit cheaper.
- There's Reef-Pi if you're a DIYer. Much cheaper, but requires more work and there's more danger of doing something wrong. Seems like a fun extension of the hobby, though.
- There's SenEye. It's a $200 PAR meter that can also measure pH, temperature and free ammonia.
- There's Wi-fi controllable power outlets eg
https://www.kasasmart.com/us/products/smart-plugs/kasa-smart-wi-fi-power-strip-hs300 . You can combine this with one of those smart home things (eg
Amazon Echo if you're OK with
Amazon listening in on everything you do).
- There's Alkatronic (that setup video scared me off that one) or kH Director (looks like it doesn't require a full GHL controller). If you're mostly interested in the Apex for the trident and dosing, these can also fill those gaps.
If you go for Apex, I highly recommend just going EL. ORP is obtuse and difficult to make actionable. Salinity would be useful if you don't have/don't trust your ATO, but I'd definitely get an ATO before an Apex. The Apex EL comes with pH and temp probes, which is what you really want.