[beedee]

I've been noticing these bubbles forming all along the waters edge of my tank a few hours after dosing one pump of Pfertz Micros. Has anyone else experienced this?

Here is a picture:

 

[acitydweller]

i havent witness this with two batches of pfertz.

 

[beedee]

Here are a few more specs on my tank.
Water: Conditioned Tap (long beach, ca) I use one drop of API conditioner per gallon of water change

Liquid Ferts: Pfertz Brand "N", Seachem P and Seachem K, Seachem Excel, Seachem Iron

NPK is dosed, one pump, on M-W-F, "M" is dosed one pump on Tues & Thurs. (mornings) Iron is dosed Wednesday evening.

Food: Kens Premium Color Max flake, and Earthworm Flake, fed once a day, in tiny tiny pinches, in the evening.