Interesting. Thanks Cheryl. I'll have to give the brown sugar a try in one of my units. I've got two on my 29g so I can run them side-by-side and see how they compare.
29g Eheim Classic 2213, community, heavily planted, 65W CF, 2x Hagen CO2
20g Fluval 3 Plus, nothin' but shrimp & snails, 65W CF, Hagen CO2