Tank-cooling solutions worth buying?

I asked this question on r/axolotls but I guess this subreddit is better for this kind of questions.

Winter seems to end where I live so I am thinking about some solution for cooling my tank. I know that bottles with ice are widely used but I am looking for something more effective on really hot days and more convenient for me. Do you have any experience with tank fans? Aqualighter aFAN is the one that caught my attention recently because it's small, energy-efficient, cheap and good for tanks up to 100 l (I have 54 l now). I'm wondering if it's worth a try or it's a better idea to build my own cooling system with computer fans. To be honest, I don't have much time for it so a ready solution is really convinient for me (as long as it's not super expensive and good for my axolotls). What do you think and what is your experience?

EDIT: Thanks for all the responses but I would really like to stick with fans. Chillers are great but they are very expensive and I am not sure if I really need it. I just want to cool the water by no more than a few degrees.