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I’m not opposed to water changes, and I’ll do them if an icp result/my corals are showing that they need one. I am early into dosing, so my system will be perfect as I do it more frequently.
Just keep in mind that ICP, even if accurate, is not detecting a main reason I recommend water changes: to keep organics from accumulating. All methods of organic removal are only able to remove a portion of the types of organics present, and some may just accumulate.