So I purchased some PhosGuard around 2 weeks ago to try and lower my phosphates, they were up at 0.09. The first time I put in the suggested amount, levels fell to 0.06 in around 3 days. I didn’t realize I was supposed to replace the PhosGuard after 4 days and levels shot back up to 0.12 at around 6 days. I replaced and tried again. I got levels back down to 0.06 after 3 days so I replaced the PhosGuard again. This time I got levels down to 0.03. So I figured one more time should do the trick. I measured the levels the very next day because I didn’t want them to go to 0 and today they’re back up to 0.06. I don’t understand. Is this normal? Am I doing something wrong? Now the whole bottle of PhosGuard has been used up and I only have a 45 gallon tanks. Thanks for your help!