Here is my current program, just cleaned reactor, had a ton of silt and was clogged,
I have 2 chamber 1 was reborn 2nd arm..
Switch's to all ARM...
Please advise ph settings for arm media
ARM is low.
I shut mine off when I switched tanks and it's not up yet. I think I set mine to like 6.2
I used the large. I would start at 6.5ish and walk it down.