It is necessary to check for the CYA amount so you can establish what FC targets to employ. In the event you don’t Possess a SWG, CYA is typically stored among 30 and 60ppm. Should you have a SWG, CYA is usually saved between 60 and 90ppm (see notes). Also, If the plaster is less than just one calendar year old, it is suggested to change again i