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**May not be combined with any other offer.
Code expires 12/13/13
Mardel BacterShield provides relief from unwelcome parasites and keeps your fish happy and healthy. Mardel BacterShield for freshwater and saltwater is a bio-adhesive supplement that repairs and strengthens the fish's natural slime coat, which helps protect against bacterial and fungal infections of the fins, tail and skin. Sentry Mardel BacterShield protects against fin and tail rot, bacterial fungus and fungus and is made from a formula of natural oils and extracts. Four ounces treats 590 gallons.