I have a semi-automatic watering system for a house plant or two that has a 2-cup reservoir and the reservoir has developed some algae that I would like to get rid of. I have an algicide that the directions say should be used in a 1 teaspoon per 50 gallons of water proportion. I would like to make up a pint of diluted algicide/water mixture such that 1 teaspoon of the mixture would be the proper amount to add to the two cups of water. It makes my head hurt to think about it. Can someone help?