What do y'all think about stacked fans for my CPU?

I kept seeing I had rising CPU temps around 54 C so I bought two clear blue LED fans and spuer glued them together precisely so that they were perfectly even and bought a fan controller for my PC so now I have two stacked fans running at good and my temp seems to be 38.5 C although ive got it to 32.3 C so would there be any side effects of what do yall think about this pretty good idea or not? oh and the fan controller has three nobs so I control the two CPU fans as one and the exaust and intake as seperate and get 18 C case temp any good for all this or bad idea just waiting?