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[APD] Greensand causes plants to die?
Almost every plant I put in one of my tanks dies. I did not use anything to
clean it, the fish are fine, the java fern is fine.
The differences in the 2 tanks are this one has 4, 65watt compact flouro on
it that are about a year old and need replacing (brown algae is coming from
that I would guess) and CO2, though I cannot stand the aqua medic reactor,
will have a new one soon. Both tanks are 75 gallon, both setup with tap
water and both used gravel from the original tank (bought a used 75 and used
it to help move the fish). The lights and CO2 were on this tank before the
The biggest difference is the green sand I used under the gravel. I wanted
something to release a lot of trace over time, since I am very bad about
dosing sometimes, and have not managed to make my own mixes...the trace
especially you will go broke using seachem trace.
Anyways heres the greensand and what its made of. Theres very little info
on it in the archives that I can find, just people saying they didn't know
what it was.
Greensand is an iron potassium silicate containing 7% potassium (K20), 20%
iron oxide (Fe02), and as many as thirty (30) other elements. Greensand
loosens hard soils, binds sandy soils, regulates moisture, and assists in
the release of other nutrients. This ancient sea shore deposit is valued as
a slow release source of potash and other essential minerals. Greensand can
be mixed with Gaia Green Glacial Rock Dust to produce a broader range of
Good source of potash and trace minerals. Excellent for loosening clay
<<...OLE_Obj...>> <<...OLE_Obj...>> <<...OLE_Obj...>>
Total Nitrogen As N 00.03% Antimony as Sb 114ppm
Avail Phos as P205 00.45% Total Phos as P20 00.55%
Total Sulfur as S 00.31% Soluble K20 00.04%
Zinc as Zn 150ppm Soluble S04S 00.21%
Manganese as Mn 86ppm Boron as B 21.0ppm
Iron as Fe 11.74% Copper as Cu 21.0ppm
Magnesium as Mg 1.40% Calcium as Ca 00.55%
PH 1:10 wate 04.10% Total Potassium K20 06.06%
Cadmium as Cz 13ppm Organic Matter 07.00%
Water Soluble N 00.02% Sodium as Na 00.01%
Molybdendum as Mo 21ppm Aluminum as Al 02.80%
Vanadium as V 123ppm Nickel as Ni 42.0ppm
Chromium as Cr 381ppm Lead as Pb 148.0ppm
Strontium as S 21ppm\ Cobalt as Co 21.0ppm
Selenium as Se 218ppm
That table looks awful...goto
I thought it was water hardness killing my plants, but my test kit will not
go as high as my tap water, so I cannot tell. After reading Toms thread from
2001:) about hardness not mattering I am thinking that is less likley.
Any ideas as to why my plants die? and or any feedback about the greensand.
I used very little of it, mixed with a pile of sand/soil I had sitting in
water for about a year.
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