If your goal was to simply lower them just because they were high I’d say that is a poor reason……ignore them. That said, if you wish to lower them to give yourself an insurance policy
IF your chlorine level drops below minimum, now we’re heading down a legit path. Truth be told this is the path I’ve taken for the last few years now,
So first things first……
I don’t think your phosphate level is high. I say that because you’ve yet to post your level from your kit. Pool store testing sucks so until you’ve got your numbers, ignore the entire thing. I see you’ve bought a kit so there’s a good start.

Until that gets there and we know your actual numbers this entire thread is an argument, not a plan of attack. Once we know your numbers then we can form a plan.
Until then we can learn, learn about why using a phosphate remover maybe a negative. First is the cost, it can be expensive. It can also however be cheap, all depends on your conditions. In some areas of the country phosphates are re-added to a pool frequently as the water department uses them to protect the pipes. If you fall into this category you’ll be consistently adding remover to combat the addition of phosphates. It’ll be a never ending cycle. Same goes for some pool care products. Some sequestrates also use phosphates, so you’ll be in a cycle stuck removing them and adding them at the same time. That price will add up.
If however your pool doesn’t fit into that category like mine didn’t, you can move onto the next item, cloudy water. If your water is high in phosphates and you add the phosphate remover your water will become cloudy rather quickly. Not an issue if you do the process in early spring when the water’s too cold to swim in. HUGE problem if you do the process on July 3rd.

To combat this some products actually go as far as adding a clarifier to their product so it’ll help reduce the time your water is cloudy. Nice in theory, bad as it easily can mess up your filters media. High quality products however don’t add this, stick with those. Your pool maybe cloudy for a few days, but it’ll clear up. Again, smart to do this when the pools simply not in use.
So there’s the two largest issues, cost and cloudy water. I’ve never been the type of person who says “don’t do something,” rather I’m the type that’ll give the info and let you decide. Regardless though DON’T act on anything just yet. If you do decide to move forward do so with your own kit as we all know the history of pool stores amazing track record on getting test results correct.
