I don't trust any controller. The bottom line is that any controller is a single point of failure.
For redundancy, I have both GHL and APEX controllers on my tank. I like the Apex fusion dashboard graphs a lot better than GHL connect. However, I trust and like the GHL features better. So I use the APEX to monitor parameters and to control my back up equipment, i.e., heater and pumps. GHL is my main controller for equipment and lights. Having two controllers also helps with understanding if probes are getting out of calibrations.
I have had some issues with my APEX that I lost trust in their products. Especially when I had more than 7 modules hooked up, it drove lots of random restarts until I unplugged some to get back under 7 modules. This week my dos stuck on when fusion said it was off, luckily it was my premade saltwater that the Dos was pumping into the tank. I was lucky, and I caught it in time to unplugged it, or I would have water everywhere. I have not had any issue with APEX customer support as they respond quickly to any request I put in. However, that doesn't fix the fact that I have had 3 failures in a year and a half. I have also used GHL support they respond quickly also.
For redundancy, I have both GHL and APEX controllers on my tank. I like the Apex fusion dashboard graphs a lot better than GHL connect. However, I trust and like the GHL features better. So I use the APEX to monitor parameters and to control my back up equipment, i.e., heater and pumps. GHL is my main controller for equipment and lights. Having two controllers also helps with understanding if probes are getting out of calibrations.
I have had some issues with my APEX that I lost trust in their products. Especially when I had more than 7 modules hooked up, it drove lots of random restarts until I unplugged some to get back under 7 modules. This week my dos stuck on when fusion said it was off, luckily it was my premade saltwater that the Dos was pumping into the tank. I was lucky, and I caught it in time to unplugged it, or I would have water everywhere. I have not had any issue with APEX customer support as they respond quickly to any request I put in. However, that doesn't fix the fact that I have had 3 failures in a year and a half. I have also used GHL support they respond quickly also.