[ben]

i dose kalk via a stirrer , and after about a week or so it starts to go to a light brown colour.

is this normal?

thanks
ben

[Simon Garratt]

How much are you putting in the stirrer at a time Ben.

Kalk quite often does this if you have too much in solution in one go as the impurities in the RO water bind to the powder. keeping a sensible quantity in the reactor usually stems this effect. I used to put approx 1" worth in the bottom of my Ratz stirrer and top it up with a spoon or two very week, flushing it out and changing completely once every month.


the other thing it could be is impurities in the Kalk...quality varies massively from supplyer to supplyer. The best ive come across was lab grade Kalk from LabPack which has a purity rating of around 98.9% not including water content...

Regards

Si.

[ben]

hi si.
i put in about half an inch in the stirrer, so i guess its not a reaction with the RO. mabye its the quality as i get it from ebay. ill try the labpak stuff and see if the problem goes.

thanks for the help


ben

[Social D]

My labpak stuff goes brown after a while if you recharge it every 3 to 4 days it stays white

[ben]

ive just ordered some labpak kalk so i will see if its any different

[SLAPPY]

Simon Garratt, on May 29 2008, 05:17 PM, said:

The best ive come across was lab grade Kalk from LabPack which has a purity rating of around 98.9% not including water content...

Regards

Si.

That's interesting Si, I would have never given that a thought.

Ben, Tim how are you finding the new stainless impellors?

[Social D]

Lasted the same amount of time as normal ones, Still works but is noisey.

[ben]

i dont think mine has a stainless impellor. to be honest i didnt know about them. ill get one and try it

[SLAPPY]

I'm thinking of converting mine to have a stirrer rod like the Deltec ones. Got a 24v DC synchronous motor to make the conversion.

[ben]

yeh the thought of the impellor wearing was on my mind