RedCourt Posted April 4, 2013 Report Share Posted April 4, 2013 New spa owner and I'm having some frustration trying to buy MPS. There are so many different non-chlorine shock's available and apparently MPS can be referred to my several different chemical names... Potassium peroxymonosulfate potassium monopersulfate monopersulfate compound ...what about sodium persulfate, thats the Spa-Kem non chlorine shock at Lowes, is it the same..? The GLB Oxy-Brite is 41.3% w/ "unique blue water brightening crystals that polish the water" Oxy Spa Non-chlorine MPS is 42.8% I don't want extra crap, I want the most straightforward compound I can get, what's the 55+% of "Other stuff" in the MPS shocks? Do I need it and can I find/use straight Potassium peroxymonosulfate? Quote Link to comment Share on other sites More sharing options...
RedCourt Posted April 4, 2013 Author Report Share Posted April 4, 2013 Oh yea, and how do you measure MPS in the water? I have the Taylor kit, but I didn't see anything regarding that. Quote Link to comment Share on other sites More sharing options...
chem geek Posted April 5, 2013 Report Share Posted April 5, 2013 Peroxymonosulfate and monopersulfate are the same. The persulfate is not and can be irritating -- it's a minor compound in standard MPS products. The most pure MPS you normally can get is 43% and that's because it comes as a triple salt so that's normal and not extra junk you don't want. GLB is a good brand, but you can get the Oxy Spa if you want since that also has a high concentration of MPS. You can read more about http://www2.dupont.com/Oxone/en_US/assets/downloads/K20102_Oxone_Technical_Bulletin.pdf'>Dupont™ Oxone® which is the main product that most MPS brands come from. You can see that the compound is 2KHSO5•KHSO4•K2SO4 so contains potassium bisulfate and potassium sulfate as part of the triple salt. The http://www.sciencelab.com/msds.php?msdsId=9926358'>MSDS shows some additional minor contaminants of potassium peroxydisulfate (aka potassium persulfate) which is the minor irritating component and magnesium carbonate. Are you using the Nature2 system? If not, then there's probably no need for you to be using MPS. If you do want to measure it, then you can get the http://www.taylortechnologies.com/products_kitinfo.asp?&MarketID=1&KitID=2266'>Taylor K-2042 to be able to distinguish it from chlorine in the test kit. You can also get test strips for it which, for the purposes of using Nature2, is OK since it doesn't have to be that exact and the strips are OK. Quote Link to comment Share on other sites More sharing options...
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