a pm1 and a break out box will do the job. I'm going to use two of them for my ATO. One as a backup shut off switch and another to tell me when my ATO level gets low. I also have an apex jr, I got a crazy good deal on one and couldn't pass it up. I have added a pm1 and eb8. I really like the dosing boxes they look great. I may have to pick some up
I used h2ocean until I cut 1000 frags for rap and crashed my tanks. After I restarted, I went to IO regular. Used that for a while but I don't like the consistency, and dinos appeared. So I switched to Red Sea regular and it's been working great. I have a bucket and a half of h2ocean if you wanna buy it...cheap.