The effect of the cleaning tablets I can not even try. But the settlement of the purchase I'd like to say something: It should be noted here that the cleaning tablets from this supplier "loose", ie without packaging (as shown in the offer will) be sent in simple, thin envelope (damage not excluded!). For this even more Shipping fees are assessed when the supplied large letter for delivery has been issued on eg. Somewhat questionable and unfortunate for the customer, I think. A clear indication of the beginning of such "measures" would not hurt in the offer entirely.