Thanks again. Correct on both accounts with cycle. Old established rock and new live rock from Gulf Live Rock. No dry rock went in the tank that had to cycle. Sand was all new though. Didn’t use anything else of the old sand. Used half dry special grade and half live from GLR. This formula worked like a charm for me. Instant cycle.
Ozone is super simple to set up, BUT you need to do it right. Just need an Ozone generator, dryer to dry air going into generator, some ozone safe airline, and an ozone reactor. I use my skimmer as the reactor. Skimmer needs to be ozone safe.
Rule of thumb to be safe is to set up the generator to produce 15 - 25 mg/h of ozone per 25 gallons. In my case I have 170g net volume and set my generator dial (Poseidon 200) between 4 and 6. I was running it 24/7 but backing down to 8 hours a night. Goal for me is water clarity and probably don’t need to run it as much.
The one thing ozone will give you that nothing else comes close is crystal clear water. Ozone just removes all color/ tanning and essentially becomes invisible ( outside of whatever is flying around in the water. Cost for my setup is under $300. Below is a visual from Ozotech. I don’t have a flow meter but considering getting one.