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@BackbayReef
SCRM😎 Cool Kids🧠Reef Guru
Joined May 2026265 posts1,033 pts★5.0(2)
🔧 Build Contributor
Water Chemistry·Sep 10·👁 149#1

Chasing pH or Alk (or Both)?

I’ve read numerous reports and testimonials that higher pH will yield faster growth, esp SPS. That’s why I’ve been obsessed with trying different things: outside air to skimmer, CO2 scrubber, kalk, soda ash, etc. I can crank pH up to 8.4 but honestly, it’s too much effort and I don’t have the patience to keep pH up. In the end, my tank suffered. I’ve end up going back to either 2-parts or CaRx, which I can consistently keep Alkalinity stable. However, my pH is back to 8 to 8.19. Questions: what pH ranges are you guys running and what methods work well for your tanks?

— /yolo

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  1. @Drexl
    SCRM😎 Cool Kids⚡SPS Slinger
    Joined Aug 202688 posts364 pts📍 Porter Ranch, CA
    Sep 13#17
    Yeah, I like the ornamental macros better, they’re not fast growing, add some nice color and give refuge to the micro critters.

    — Clams and acros

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  • @BackbayReef
    SCRM😎 Cool Kids🧠Reef GuruOP
    Joined May 2026265 posts1,033 pts★5.0(2)
    🔧 Build Contributor
    Sep 15#18
    As an update - I’ve been dosing Kalk at night for 12hrs through the K2 at 10mL/min (need need to go higher). Lowest pH was 7.99 and now it’s 8.11 so ain’t bad. Might need to tweak it a little more: start earlier and more kalk.

    — /yolo

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