I can't place an ID, but just a reminder that if you have an algae or bacteria outbreak, testing for things like Phosphate/Nitrate is usually misleading. During an outbreak, things like Phosphate/Nitrate are absorbed by the algae/bacteria as fast as it's being produced, thus it tests negative. So, in turn you may have a Phosphate/Nitrate issue and no test kit is going to be able to show it.