Instructions: Put one tablet in your water tank every 3-6 months
Make sure the water you have in your tank is not hard water. Using bottled water instead of city tap water can be a better option for keeping the water clean. If the tank is currently dirty, you may want to rinse/flush it out with some rubbing alcohol and then fill it with clean water. Please note that simply adding a purification tablet to water that is already cloudy will not help clear up the water.
If you find that your tank has grown algae due to lack using purification tablets, empty as much of the algae water as you can then fill the tank back up to where it was filled to previously. Next, add a 1/4 cup of an algae cleaner (Pondcare Microbial Algae Clean solution works well). Give the handle a couple pulls to mix the solution into the water. The solution suggested here will not harm your tank if you leave it in. You can row with it in without worrying about damaging your rower. Once the tank is clear again, go ahead and add a purification tablet.
Disclaimer: We have used these in nearly every rowing machine that uses water and they work perfect but for legal reasons we recommend you checking with your rower company / owners manual for what kind of tablets to use and how often to use. DO NOT SWALLOW TABLETS, KEEP OUT OF REACH OF CHILDREN