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post #1 of 3 (permalink) Old 11-13-2005, 06:16 AM Thread Starter
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help with pmdd

A little background 33g tank, 110 watts 9325k bulbs using diy c02 (until my pressurized system arrives later this week). Using 4 inches of 100% flourite. I have had mixed results but I blame that on the diy co2 and no dosing of anything.
I have read and have decided to place an order from but I am unsure of what test kits I need to keep track of all of this. Can i use the PMDD Pre-Mix by itself and if so can i survive on just the ph kit which i have and go by a kh kit so that i can keep track of my co2 levels. How long will one pound of this stuff last?
I would like to eventually keep track of everything and understand all of what is needed to keep a healthy tank but i am still overwhelmed by all of this, and no matter how much reading i do it never sticks in my brain. So for right now I need "ferts for idiots"
thanks in advance for any advice (or wisecracks Rex )
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post #2 of 3 (permalink) Old 11-13-2005, 02:02 PM
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The most popular method is called the Estimative Index and requires no test kits at all.

Of course you still need to test your KH and PH to caculate your CO2 levels.

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29 Gal. - 100% Eco-Complete/2x65W CF/CO2/Filstar XP2/RedSea500/KH:3/GH:5/pH:< 5.5/EI Dosing/WWC 50%
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post #3 of 3 (permalink) Old 11-13-2005, 02:12 PM
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Find out what is in your tapwater first by getting a technical water report, not the consumer confidence report that is typically provided. I use the Aquarium Pharmaceuticals pH, KH&GH combo, Nitrate, and Phosphate test kits. I dose to hit the middle of the recommended ranges shown here:

I think in the long run you'll do better dosing the individual ferts rather than an all-in-one mix. Greg Watson sells individual chemicals too.

KNO3 for K+ and NO3, also sold as stump remover
K2SO4 for K+
I use Discus Buffer - monosodium phosphate for PO4
Either Flourish or CSM+B for traces
Baking soda for KH

But you need to know what is in your water to determine if anything needs to be done about Calcium and Magnesium - the components of GH.

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