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Originally Posted by chochiss
Stan stan......
The mixture of PP will not oxidise unless you leave out in the sun or it have sunlight passing through it la. Dun think your little 1g will be able to prepare mixture for thousands of liters la. I usually prep up about 1litre of pp @ 2ppm & it'll last me bout 3 months....depending on fishes health. I do drop in meds & help out for my friend's LFS in the quarantine section. So you want the calculation onot?
You see the thing about pp is......
- Measuring the right amount of ppm is a must cos if not.....death will occur.
- The color purple stays in the same shade of tint no matter how much you dose it.
- Color transitions will be from purple to pink then when all pp is spent, it'll turn brown.
- I do not use it regularly as it'll stress up the fishes cos it's a little caustic. But it'll surely brighten up your fishes' color though.
- You can discolor or de-activate pp by dousing H2o2. It clears up pp & de-activates them.
In preparing meds through chemicals & organic science...I'm a mad scientist!!! All this are done with the help of my wifey though....sometimes you just can't argue with a future biotechnologist. Damn........
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Chochiss Chochiss,
So your methods differ so we have to agree to disagree.
For one, it's safer to do water change than to add another oxidising agent. Sounds like you didn't do your homework when you tell people to add another highly reactive agent into the tank.
Sure it deactivates the PP but it adds more stress to the fish doesn't it?
A little Sodium tiosulphate after the WC is better IMHO or just sticking in some Activated carbon in the filter after WC.
On my inadequacies, i admit i don't have a scale that can measure even 1 gram let alone fractions of it. So i have no idea how much 1 gram of PP is.
4 discus tanks for me is 960 liters of water which means for one time dosing i only use is like a teaspoon of PP which is like too many grains to count and to light to measure. [My mom's baking scale is per 100g.]
If you did your calculations, 2000 liters of water per 1 g of PP is 0.5 mg/L is on the safe side, then again i look for the colour method.
For using PP, look here
for dosage bearing in mind this is for pond treatment.
The article states to look out for a light pink colour. I am sorry you are tonally challenged so you may have to rely on the textbook way, though not wrong but not perfect either.
Oxidisation factor in the tank is a factor. If higher, the colour doesn't last and you need to redose extra[refer to article], a light pink colour to be maintained over a period of time for effectiveness.
Practical is much different, bigger fish can tolerate higher doses and smaller ones may not as expert opinion will tell you.
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The method of mixing a swab of crystals into 500ml of water and pouring a little into tank, swirling it a bit to check for colour tone, then pouring a bit more to get desired colour is really simple, unless you are tonally challenged.
Discus breeders in Malaysia have been using it for decades this way, I'd be mightily respectful of their opinion considering some of them maintain anywhere between 100 to 1500 tanks with daily WC.
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No point in keeping PP around the house in it's stock solution state. Keeping something like this for 3 months is a disaster waiting to happen.
Seriously, hope you don't have kids who may mistake it for Ribena. Luckily you state it's for an LFS.
Home users will want a simpler less riskier method.
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R
Stan
BTW, I took the time to research my opinions before i post them.