: Maintaining Clear Swimming Pool water over Winter can be a simple as ensuring the chlorine level is kept topped up. This might sound obvious but it can be made a simple process that will save you so much time and money in the Spring when your pool water is totally Clear, rather than green and swamp like. By simply adding a Pre-Filled Floating Chlorine dispenser to  your pool it can keep your pool water Crystal Clear and totally Algae free all over the Winter months. World of Pools has a 2kg Pre-Filled Chlorine Tablet Dispenser that costs only £32. This can help keep your chlorine level up high enough until you re-open the pool again in Spring.