Abstract: Systems and methods for generating a sampled leaderboard for display on a local exercise system include receiving a request from a local exercise system to start an on-demand class, delivering content for the on-demand class, downloading a leaderboard for the on-demand class including applying a filter to the leaderboard to generate a filtered leaderboard for a user of the local exercise system, determining whether the filtered leaderboard to be downloaded to the local system has a size less than a threshold value, generating a sampled leaderboard if the size of the filtered leaderboard to be downloaded is greater than the threshold value, wherein the sampled leaderboard is generated with a size less than the threshold value, and downloading the filtered leaderboard and/or the sampled leaderboard. An approximate rank for the user on a full leaderboard is determined and displayed to provide comparative performance results for the user.

Abstract: The present invention relates to improved dispensers for a tablet containing or consisting of a dissolvable composition which, when contacted with water, will elute one or more chemical compounds to the water. More particularly the present invention relates to such an improved dispenser for a tablet which according to one aspect of the invention is particularly useful with, or forms a part of a device for the treatment of water, particularly a device useful in the purification of water.