The Planted Tank Forum - View Single Post - GRO vs PRO regulators
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post #1 of (permalink) Old 09-23-2015, 05:26 PM Thread Starter
Algae Grower
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GRO vs PRO regulators

What exactly is the difference between the GRO and PRO series regulators?

And what is the difference between the outdated Ultimate CO2 regulator and the new PRO series (or GRO, whichever is more relevent)?

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