Skimmer Over Flow

[Reef Pilot]

Well, maybe you have the water set too high in your skimmer. Open it up a bit. Mine usually produces more bubbles and foam after a water change, and I have to be sure my water level is not too high or it will overflow.

I think outside air pressure affects water levels in the skimmer, too. Was it a high pressure day?

Or whatever you were dosing might have affected it....

Some skimmer mysteries just remain so....