Do you have experience with cats that have crystals in their urine?

Hi!

First off - yes, my cat has been to the vet for a thorough examination:

I noticed my beloved cat sleeping, drinking and eating more than usual. I took him to the vet where they gave him an overall general exam. The vet told me everything looks good and normal on the outside, and also took blood tests and urine samples to rule out any underlying issues.

The vet just called me back now and informed me that his blood samples came back good, no worries there, but they detected some crystals in his urine. He recommended that I switch to a diet specifically for urine health.

I am about to drop off a poop sample later today (as requested) and pick up the recommended food and possibly ask some more questions while I am there.

I am so glad I took him in, even though he hasn't acted like he's in discomfort, the subtle changes were enough to bring him in for an examination and I hope that early detection will allow me to make the changes necessary to prevent any future issues.

My vet did not give me any reason to be worried, he only recommended I switch to a diet for urinary health. I am obviously listening to my vet, and following the advise he gives me, but I'm a slightly worried cat mom now and naturally feeling curious to see if anyone else has first hand experience with this?

Any and all advise and tips greatly recommended!

(my cats have a water fountain, they both drink from it)