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post #1 of 7 (permalink) Old 03-22-2004, 09:23 AM Thread Starter
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For those who are using Sears Conlin PMDD recepie, I have some questions regarding the phospate content in it. The approach of this recepie is to provide a balanced diet for aquatic plant at the same time limiting phospate so that algae wont thirve in planted aquaria.

Considering that I already feed my fish alot and phospate are available in my water column, by adding PMDD fert. which contains phospate, would it actually create an extra amount of phospate that leads to algae bloom?
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post #2 of 7 (permalink) Old 03-22-2004, 01:51 PM
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Quite possibly yes. Maybe not a case of green water (if thats what you mean by bloom) but more likely excessive hair, beard, staghorn, etc.The Sears Conlin recipe is unfortunately a "one size fits all" solution to dosing ferts. I dont think most people use this recipe because it really should be finely tuned for the specific aquarium. Many (myself included) dose each fert dry. This way you can dose only what you know (by using test kits) your tank is using up. I dont recall how much KNO3 is in the recipe, but I would suspect that it may be more than you need considering feeding and po4 already in your water supply.
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post #3 of 7 (permalink) Old 03-22-2004, 01:56 PM
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If you don't dose them dry you should at least mix them up seperately and dose them seperately. PMDD gives you a control over the levels of nutrients in your tank that is very hard to match with any commercial product.

Dosing dry KNO3, 1/8 teaspoon per 10 to 12 gallons of water will give you approximately 10 ppm of N.

If you know dosing P is going to cause you to have too much in your tank, don't, the current idea behind PMDD is to tailor the nutrients to the tank, not to the recipe.

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That IS an aquascape, it's titled "The Vacant Lot".
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post #4 of 7 (permalink) Old 03-22-2004, 03:20 PM Thread Starter
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what do you mean dose them dry? you can just put the pwoder in and let it dissolve?....what if my fish eats it and get food poisoning?
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post #5 of 7 (permalink) Old 03-22-2004, 03:50 PM
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Take a cup of tank water and dissolve the dry powder in that before putting it in your tank.

Are you the guy they have that tag on hairdryers for? You know the one that says 'don't use in the bathtub.'

Sean

Aquascape? I'm a crypt farmer.

It's a fine line between fishing and standing on the shore looking like an idiot.

That IS an aquascape, it's titled "The Vacant Lot".
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post #6 of 7 (permalink) Old 03-22-2004, 05:32 PM
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Quote:
Originally Posted by sqarit
what do you mean dose them dry? you can just put the pwoder in and let it dissolve?....what if my fish eats it and get food poisoning?
:lol: :lol: :lol:
I was laughing so hard at the food poisoning part. But I dissolve them in a tiny bottle and dose as I need them, once you know how concentrated it is, you know how many ml to use to raise it how many ppm. Use chuck's calculator. Works pretty well for me.



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post #7 of 7 (permalink) Old 03-22-2004, 10:30 PM Thread Starter
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Don't laugh at me!
It's ok it was meant to be a joke...fish could die from eating it, who knows...
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