What "fertilizer baskets"? I don't recall ever seeing such a thing.
I have not hear of this either and the photo doesn't work on tapatalk.
Those look pretty cool, how long is the spike, and the basket? Looks like they would work best is deeper substrate layers. Gel caps may still be better for the foreground.
damn, my original intention was to keep the granules particles in the baskets instead of going all over the places in the 170G tank.The baskets possible.