I suggest Seachem Flourish Tabs. You insert them in the substrate.

"Marvin Hlavac" wrote in message
le.rogers.com...
Hi All,

I have 100% Fluorite substrate. Is this sufficient fertilization for sword
plants? If not, does it make any sense to use TMG or any water column
fertilizer
for root feeders?

If 100% Fluorite substrate is not enough what fertilizer would you
recommend?

Thanks a million in advance,

--
Marvin
hlavac (at) rogers (dot) com