Evolution Aqua (EA) Pure+ Filter Start Gel 2.5L
 
Pure+ Filter Start Gel  is a live concentrated bacteria in a gel that sticks to filter media such as K1 or K+ but can be used on all types of filter media. It converts ammonia and nitrite therefore it can be used to mature new ponds or help reduce spikes in existing ones.
 
2.5L treats ponds up to 25,000 Litres