Blagdon Clean Pond Pods 24 PouchesEffective against blanketweed string algae, consumes sludge, makes tap water safe, reduces filter cleaning and feeds aquatic plants. All in one treatment ~ Reduces pond filter cleaning and maintenance ~ Pet and wildlife safe ~ Beneficial to filter bacteria ~ Encourages plant growth and flowering ~ Perfectly paired with Clean Pond Machine Filter ~ Can be used in other filters and directly into the pond ~ Suitable for use in all ponds: planted ponds,