lettuce sea slug

Hello everyone! I’m considering adding a Lettuce Sea Slug to my aquarium but I'm unsure if I have enough space, as well as if I can keep it alongside other algae eaters. How many gallons does a Lettuce Sea Slug need to thrive? Thank you all so much for any advice/support! Best of wishes.

Background: I bought a mini desktop aquarium (0.6 gal) which I have on my desk at work. I do 90% weekly water changes and have a lot of algae for nitrate removal. It has been running without issues for about one month. In this aquarium I have various coral, stomatella snails, and 3 lettuce...

im a huge fan of gastropods, and i would love to have one of these amazing creatures in my living room, and i know that they are somewhat photosynthetic, stealing genes from algae, but are the blue ones AS photosynthetic? the blue ones are absolutely gorgeous, but all the other gene-stealing...

Has anyone had issues with zoanthids or Ricordea mushroom coral harming the lettuce sea slug ? Ours is only about half inch maybe 3/4” when roaming around. Worried about the size of the lettuce sea slug and the size of the mushroom or zoanthids possibly eating or shocking it.

ok so i just ordered a lettuce nudibranch or lettuce sea slug i know they suck the chlorophyll out of bryopsis which is why i got it because i have bryopsis and i thought he could be a really big help but my question is will it become more green with the more algae it eats it looks like this...

Is this a lettuce nudi? Got it for free with some snails. Guess they accidently threw it in.

This is my tank for my 2 dwarf seahorses that I will be getting later this week! I am super excited to get them, along with 1 lettuce sea slug! :D