Planted Tank Obsessed
Join Date: May 2019
Location: Palm Springs, CA
I've done the DIY Osmocote gel caps. My nymphea rubra, crytps, vals, swords etc all love them.
To keep from overdosing, I use half substrate/half Osmocote in the caps, bury them all the way down to the bottom glass, and start very conservatively in case it does get into the water column & cause a nitrate spike. I also use a low dose of nilocG's Thrive to keep the stems & floaters happy.
Word to the wise--use a pin to poke a small hole in each end so they'll stay sunk. Hold them under water for a minute or so for the air to bubble out & water to replace it. Learned the hard way that they'll pop right up to the surface even when buried in 2-3" of substrate.