Lyme disease is diagnosed clinically based on symptoms, objective physical findings (such as EM, facial palsy, or arthritis), or a history of possible exposure to infected ticks, as well as serological blood tests. The EM rash is not always a bull's eye, i.e., it can be solid red.
Rule of Thumb for Changing Filters. The rule we have followed for 18 years in the filtration industry is to change filters every 6 to 12 months. Six months is almost always optimum, especially in commercial/office settings, and twelve months is as long as you want to go no matter what.
Steps. 1  1. Every week you will need to change about 25% (perhaps more depending on your water readings/types of fish you have) of the water in your tank. How much and how often depends on the weekly test results and isn't covered in this article. 2  2. Make sure you have some basic equipment.