fragging question

reefkprz

Active Member
I wouldnt reccomend it as gypsum is highly soluble in water especially at temps over 70deg F and will release calcium (not bad but) it will also release sulphur into the tank. Some natural and synthetic sources of gypsum also contain other chemical compounds, such as calcium carbonate (agricultural lime), calcium oxide (burned lime), or calcium hydroxide (hydrated lime). these will buffer the water but the sulphur is a major drawback IMO. depending on the type of gypsum it could also release magnesium into the water.
Mineral purity of natural samples varies with the local geology and the mining technology employed at the site. Samples obtained from northern Ohio mines near Port Clinton were predominantly gypsum, but also contained dolomite [CaMg(CO3)2] and quartz (SiO2)
Table 1. Mineralogical composition of gypsum samples.
Source Minerals* present
Synthetic gypsum1 gypsum, quartz
Natural gypsum2 gypsum, quartz, dolomite
Cast gypsum3 gypsum, quartz, anhydrite
Drywall gypsum4 gypsum, quartz, portlandite, calcite
1 Samples obtained from the W.H. Zimmer Station in Moscow, OH, owned by Cinergy Corporation
2 Samples obtained from the Kwest Group at Port Clinton, OH
3 Samples obtained from Mansfield Plumbing Products, LLC of Mansfield, OH
4 Samples obtained from Transfer Services, LLC of Columbus, OH
* gypsum = CaSO4•2H2O, quartz = SiO2, dolomite = CaMg(CO3)2, anhydrite = CaSO4, portlandite = Ca(OH)2, calcite = CaCO3
the information directly above is quoted from
ohioline.osu.edu/anr-fact/0020.html
 
Top