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post #1 of 14 (permalink) Old 03-27-2004, 10:50 AM Thread Starter
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Few basic questions:
- Can I assume that I have enough Mg if my GH is extremely high?
- If so, do I still need to add MgSO4 in the PMDD?
- Is is safe to use Nu-salt (Potassium Chloride) as the source of Potassium?

Thanks :lol:
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post #2 of 14 (permalink) Old 03-27-2004, 01:51 PM
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Maybe, the only way to know for certain is to do it and watch for magnesium deficiency problems.

Yes, but if you use KNO3 you are already adding K in excess.

Sean

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post #3 of 14 (permalink) Old 03-28-2004, 01:59 AM Thread Starter
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Why only for low lights? Is there anything I can add to make it work for high lighting?
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post #4 of 14 (permalink) Old 03-31-2004, 10:27 PM
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i think all you have to do is just add extra dosage of PMDD. I do a 3drops/day on my 10 gal tank. good enough to keep my iron level at 0.1 mg/l
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post #5 of 14 (permalink) Old 04-01-2004, 01:52 AM
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Not to hijack the thread but on the question of Magnesium..

I looked at the report for my area online and there doesn't seem to be any magnesium listed? Only Manganese (Mn)? Is the report just incomplete possibly?

http://www.town.lasalle.on.ca/enviro...CALRESULTS.pdf
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post #6 of 14 (permalink) Old 04-01-2004, 02:30 AM
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They didn't list Calcium or hardness or pH either. Odd way to test water.

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 #7 of 14 (permalink) Old 04-01-2004, 06:27 AM Thread Starter
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Otherwise or whoever can help me calculate:

I have 3 tanks 55, 20 and 10. They all have similar water parameters. So just help me with the 10 and I can calculate from there.

pH tap : 7.8
pH tank : 6.9 after CO2 injection
KH : 6.7
GH :300 ppm
PO4 : less than 0.1
Nitrate : 3ppm
Magnesium : 26ppm (from tap water report)
Iron : My test kit expired. Gonna have new one soon.
Substrate : Onyx sand

Densely planted. So far there is no sign of nutrient deficiency. Every time I tried to add Flourish, I have algae problem, especially hair algae. The weird thing is that I even dose it less than half of what on the direction. I haven't dosed anything for the last 3 weeks and the plants still look good.

What do I need to dose, how much and what shouldn't I dose now??? Also, please tell me how to dose it properly before and after the targets are hit.

Thanks for the help :lol:
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post #8 of 14 (permalink) Old 04-01-2004, 06:30 AM Thread Starter
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Oops, I forgot to mention about the lighting. It's 2x15 watts ODNO. Looks like equivalent to 5watts/gl. Because it's still slightly brighter than using 3x15watts NO.
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post #9 of 14 (permalink) Old 04-01-2004, 06:42 AM Thread Starter
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Oh, there is a typo, my PO4 is under 0.5
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post #10 of 14 (permalink) Old 04-01-2004, 07:36 AM
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Quote:
Originally Posted by sqarit
i think all you have to do is just add extra dosage of PMDD. I do a 3drops/day on my 10 gal tank. good enough to keep my iron level at 0.1 mg/l
But does your tank have high-lighting, and C02? The problem is the original formula limits PO4, but with high-lighting PO4 needs to be added sometimes. Unless you have a really big bioload and heavy feedings, PO4 still needs to be added seperatley from the PMDD.
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post #11 of 14 (permalink) Old 04-09-2004, 10:28 PM Thread Starter
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Thanks Otherwise I bought my stuff from GregWatson except that I use fleet enema to dose my PO4. Ok, I have my Nitrate up to 9ppm and PO4 only to 0.5ppm-0.75ppm. I saw less algae so far. Do you think I would have algae problem if I raise the PO4? I'm kind of worry since every time I dose a bit micro (even just 2 drops), I get a lot of hair algae. They don't grow if I don't add micro. I do have a lot of fast growing stem plants in there. All the plants are growing nicely and don't show any type of defficiency. Just those few hair algae on top of the plants close to the light.

Oh, there is no greenspot or other algae at all in the tank. Even the brush algae is gone. Only some hair algae. Is it caused by too much light?
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post #12 of 14 (permalink) Old 04-11-2004, 02:25 PM
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which is better between Sears & Collins' recipe and poor man dupla drops
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post #13 of 14 (permalink) Old 04-11-2004, 04:32 PM
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Jimmy

The S&C paper produced a method for people to see how to create a recipe for their tanks thjrough trial and error. We all call that result PMDD. However the recipe is supposed to be dependent on what your tank needs. Don't just use the recipe that S&C came up with for their tanks, it will probably fall short someplace for you because you probably don't have the same tap water, or substrate, or plant community, or fish community, or fish feeding regime, or lighting....... ad infinatum.

Use the paper to follow a method to make a PMDD that works for you. And then read a little more and find out you don't want to make a single fertilizer mix, you really want all these things in seperate bottles so you can dose what is needed, when it is needed, withough dosing things that are in proper balance. Or you may want to measure out the ferts dry and not mix up a liquid at all.

You have to laugh at how a paper that was meant to 'liberate' people from the cost and constriction of a commercial product has 'bound' so many people.

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 #14 of 14 (permalink) Old 04-12-2004, 09:06 AM
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ooo i see.
so it just the basic form to make pmdd
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