"Marvin Hlavac" wrote in message ble.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,

Flourite and Laterite provide iron, an important trace element, but
only one of many. TMG or any other liquid fertilizer provides a
balance of trace minerals, but not the major nutrients plants need,
namely nitrogen. If your substrate is less than 2 years old, then
there is not much nitrogenous mulm settled in the substrate, and
although Swords will abosorb nitrogen through their leaves in the
water, swords are also very heavy root feeders and will respond well
to nitrogen added to the substrate. This can be achieved by using
something like Jobes plant spikes for ferns, or Aquatabbs which
provide nitrogen, phosphate, and potassium: the big three nutrients
plants use in large amounts.

Robert H
www.aquabotanic.com