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Discussion Starter · #1 ·
I used E.I. to grow the plants, decided to try PPS now they are grown in because I got tired of the 50% weekly water change. So I screwed up. After forgetting to get RO/DI water for 5 days, I finally remembered and set to mixing my PPS Pro ferts. After finishing I realized I used tap water instead of RO/DI. D'OH!!!

So my question is can I still use them or should I dump them and remix?

The moral of the story, kids...DON'T GET OLD!!!
 

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I quit using RO water in my tank's and solutions quite a while ago. It's just not worth the hassle. I just add a couple of teaspoons of plain old white vinegar to the solution. That will prevent any funky chemical reactions as well as fungal, mold and bacterial growth. No chemistry degree required!
 

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Discussion Starter · #5 ·
They should still be usable but watch out for fungal/bacterial growth . Tap water has some small amout of bacteria in it.
I put in 5mL metricide...That should cover it?
 

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I put in 5mL metricide...That should cover it?
Hi MJB13,

I dose most of my ferts dry now with the exception of Iron. Iron and/or CSM+B were the ones that always seemed to develop fungus after a while.

Metricide (glutaraldehyde) will certainly keep fungus from forming; I do 20 ml of Excel strength per 500ml (with Metricide 10ml per 500 ml should be fine).
 

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yea i never understood why people mix them. i sprinkle mine in like fishfood and it doesnt seem to affect anything
 

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I put in 5mL metricide...That should cover it?
Depends on the volume of the solution but it sounds about right. Mistergreen provides another good reason to use RO water.

As to the reason why make a solution...
1. accuracy in dosing for small tanks
2.uniformity of the dose/substance (a tsp has some degree of variation, the mass of the substance in a tsp depends on the density of the powder, mL are easier to measure) (especially in the case of CSM+B where the powder is varied )
3. avoids salt burns where the undissolved granules fall and fish tasting the powders ( guess you could dissolve it before in a small vial)
4. easier to store some substances that are especially hygroscopic (MgCl2 I am looking at you )
5. professional habit from all the time in the biolab :grin2: (weight, dissolve, mix)

But that is just me, everybody is free to play however they like
 
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