So I finally got the water added but now have a bunch of noob questions. The biggest issue is the constant gurgling from my drain line into my sump. I didn't realize I needed to add a gate valve to the return line. My local shop sold me this tank and gave me no guidance at all. The instructions that came with the tank were pathetic. It had all flexible lines for the return and drain. I decided to hard plumb the drain but kept the flexible line for the returns. I added a quick and dirty ball valve to the one drain and it has helped some and I also only have my return pump running at 25%. I have attached a video of the sump and gurgling sound. Other than that my ph probe on my apex is not calibrating. I tried multiple times and it just says it failed. Not sure what to do there. All that said I'm glad to actually have the tank full. Though I must say this is frekin stressful starting out and hoping nothing leaks! Fingers crossed we are still dry! I also wanted to know when I should start my skimmer and also when to start my carbon reactor.