Application: Place a bomb in the bowl of the toilet to help descale the base of the toilet. Allow to fizz for 10min then use toilet brush to brush away the dirt and then flush.
Can also be used to unclog drains. Place a bomb in the plug hole, slowly drizzle water over the bomb so that it fizzes down the drain. Leave for 10min then pour hot/boiling water down the drain to flush it away.
Available in refills.