RAY THE CHARGER COST ME £50 I NO THIS MAY SOUND A LOT BUT NOW WE HAVE AS MUCH CS AS WE NEED I WAS SPEAKING TO THE MAN WHO MAKES THESE CHARGERS AT BLACKPOOL YOU PUT A GLASS FULL TO 3 LITRES FOR 5 DAYS THEN A TABLE SPOON FROM THEN ON EVERY DAY HOW MUCH MONEY DO WE WASTE YEARLY ON PRODUCTS TO KEEP OUR BIRDS WATER CLEAN???