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Discussion Starter · #1 ·
So I was over at the and I saw a thread where Tom Barr mentioned that
Most of the better scapers seem to eyeball cO2, they start with some relative measure of dosing for CO2, then they tweak and adjust slowly from there.
I've been using a drop checker for a while and trying to stay on target with the ph/kh table but I still feel like I'm not hitting a co2 sweet spot.

So that leads to my question: when people eye ball co2 what are they looking for? Should I gas till my fish can handle it? Is there plant decay or algae outbreaks at high co2 levels? Is there pros or cons to blasting co2?

Also if I have really high light should I have really high co2?
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