Do you have a DSB
? One issue with extra sulphor in your tank is the creation of Hydrogen Sulphide, a toxin/nerve agent that can have a disasterous effect if released in a significant quantity. It has a smell like rotten eggs and would be created in the anaerobic region of a DSB
where bacteria convert nitrate into nitrogen gas, but with a sulphate present (CuSO4 left over from the Epsom salt reaction) the bacterial reaction would produce H2S and an Oxide (CuOH). the H2S could build up over time and if the DSB
were to be disturbed, the possibility of a Toxic release could wipe out your tank.
The danger can be mitigated if NO DSB
is present or if a DSB
is left alone, and only disturbed when it is disconnected from the DT.