Triple Super Phosphate - The Planted Tank Forum
 
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post #1 of 4 (permalink) Old 02-28-2008, 08:35 PM Thread Starter
Eth
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Triple Super Phosphate

I just got home from my local nursery, and they had a product called Hi-Yield Triple Super Phosphate 0-45-0 with 45% available phosphate in the form of P2O5. Here were the ingredients:

Available Phosphoric Acid (P2O5) 45%
Arsenic 12ppm
Cadmium 11ppm
Cobalt <5ppm
Mercury <0.02
Molybdenum 4.2ppm
Nickel 14ppm
Lead <5ppm
Selenium <0.5ppm
Zinc 228ppm

Derived from Mono-Calcium Phosphate and Di-Mono-Calcium Phosphate.
http://agr.wa.gov/pestfert/fertilize...asp?pname=2008

Would it be safe to use this for an aquarium?
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post #2 of 4 (permalink) Old 02-28-2008, 09:02 PM
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The phosphate that people use to dose their tanks is KH2PO4 = monobasic potassium phosphate, not phosphoric acid. This product also contains arsenic which is a poison. Even if it is only a trace amount of arsenic I would not want to expose the fish in my tank to it (or mercury either).
You can get a pound of pure KH2PO4 for $5. Cheap enough that there is no good reason to search around for a substitute.
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post #3 of 4 (permalink) Old 02-28-2008, 09:26 PM Thread Starter
Eth
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I have some dry ferts ordered, but just found this stuff locally and wanted to see if anyone has tried it.

Thanks!
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post #4 of 4 (permalink) Old 02-28-2008, 09:47 PM
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I don't know if I would experiment with it in the water column but I do know someone that makes dandy substrate fertilizer with it. Go to an arts or crafts store that sell dark clay (you know, something that got iron in it). Pinch off a piece and flatten it to a quarter-size disk (you know, two-bits). Put a pinch of that stuff on it and ball it up again. Push it under you iron-thirst plants and there you go. They will grow like crazy.

Andrew, MASI Treasurer

This message is always under construction: 75-gallon tank; 2, Eheim 2026 filters - one twice broken; Tek Light with 4, 54W T5s (6000K) ; Sand on top of 4:1 sand:clay mixture; Milwaukee CO2 controller; PlantGuild vortex CO2 reactor; pH = 6.6, kH=70mg/l, GH=120mg/l; EI; Flourish excel on 50% weekly water change: AGA Member.
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