Do you still have your trident? It would be cool to see all three in action
No I sold the Trident, but from my usage for testing dKH, the Alkatronic wins hands down. Now I'll mess around with the KH Guradian some to see what I think about it.
Need to make some reagent for it so gotta find the home made formula online. I will say that on initial impression, I am not overly impressed with the design/lack of mounting capability. Without even running the first test, I'd have to rate them in this order for pure dKH measurement (NOTE: KH Guardian position simply because no external web UI and design. I haven't done testing yet but even if it performs well, it would likely stay where it is rated comparatively).
Alkatronic - durability, ease of maintenance, overall low cost operation, web UI/app, standalone, integrates into Apex
Trident - Test calcium and magnesium, long term durability questionable, integrates into Apex, cannot use if Apex dies
KH Guardian - support concerns, no outside web ui/app, no built in wifi
Just some thoughts that I have about each unit. From those that's why I rank the Alkatronic above the rest.
For the KH Guardian, I think it'll make a decent frag tank unit once I get it going, but not for my main system.