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[APD] Tannins in a planted tank
Hello all,
I set up a planted 7g earlier this year with leonardite Onyx sand over it. I
added some mulm to the leonardite and attempted the Low light - no CO2 setup
as Tom Barr outlined it. I ended up taking it down because the leonardite
leeched so many tannins into the water, and I really don't care for the
stained brown water look. It just looks dirty to me and I prefer clear water
where nothing is discolored yellow or brown by the tint of the tannins. I
set it back up with just onyx sand about 5 months ago and the water is nice
and clear.
One thing I wonder is if I had used a thicker layer of onyx sand would the
tannins in the leonardite have been contained away from the water column? I
only had about 1-1.5" Onyx sand over about 1/2" of leonardite since the tank
is shallow.
Will leonardite always leech tannins into the water, or will a thicker
substrate keep it out. Can it be cured like driftwood to keep it from
turning the water brown?
If anyone has any suggestions I would greatly appreciate it. I'm thinking of
setting up a little bigger low-light no CO2 tank and would like to give the
plants a better root base. But would prefer the water not to be so
yellow/brown.
Thanks,
AZ Burns
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