Aqua Pill Solar Pill enables pool owners to prevent pool water evaporation and heat loss by using a simple measureless capsule, getting the benefits of a solar blanket without the cost or hassle involved. Solar Pill is not affected by automatic pool cleaners, is safe to use with all pool types and completely biodegradable. For complete protection against pool water evaporation and heat loss, simply drop into your pool skimmer and its time-release formula provides all-day protection. One pill treats up to 30,000 gallons. Patented Delivery System for Complete Coverage Will not be affected by Automatic Pool Cleaners.