biOrb Sea shell Set Top Filter So why must we dose

So why must we dose this components in equal amounts

Easy to use: insert bio-filter rings as second last filter stage

flow rate    116l/min

such as gears

biOrb Sea shell Set Top Filter So why must we doseNatural motif that gives structure to the bed Easy to clean and quickly removed, a new ambience consistently occurs Suitable for all biOrb aquariums White, ceramic must have for embellishment of every biOrb aquarium Detailed ceramic sea shell set of three. Compatible with Freshwater Saltwater Tropical aquarium set ups. Give the bottom of your biOrb some shape and interest with these ceramic biOrb Sea Shells. Suitable for all aquariums.