12-29-2009, 06:20 AM
Chances that the blue would be from the roof are slim, but if the catchment water is blue then:
Check the roof - is it a copper metal roof that has a verdigris patina or has it been repainted a blue color?
Check the catchment liner - if it is blue & not in good condition, then that is something to check out
Most likely roof paint & liner failures will give you flecks or flakes of blue, not a water color blue look.
If the catchment water is blue & the roof nor liner seem to be the culprits, then it may be that the water was treated with an algaecide, and it is not to be used for any food prep (CuSO is not overly bad, but probably was not food grade type used...)
Check the roof - is it a copper metal roof that has a verdigris patina or has it been repainted a blue color?
Check the catchment liner - if it is blue & not in good condition, then that is something to check out
Most likely roof paint & liner failures will give you flecks or flakes of blue, not a water color blue look.
If the catchment water is blue & the roof nor liner seem to be the culprits, then it may be that the water was treated with an algaecide, and it is not to be used for any food prep (CuSO is not overly bad, but probably was not food grade type used...)