JammyJammy,
If they have it in your shops, get apple cider vinegar "with the mother" It will say "with the mother" on the label if they have it. This kind has not been pasturized and contains bacteria fighting properties. The regular apple cider vinegar (that doesn't say "with the mother") is better than nothing, but not nearly as benefical as the kind "with the mother."
Guppy
If they have it in your shops, get apple cider vinegar "with the mother" It will say "with the mother" on the label if they have it. This kind has not been pasturized and contains bacteria fighting properties. The regular apple cider vinegar (that doesn't say "with the mother") is better than nothing, but not nearly as benefical as the kind "with the mother."
Guppy