Hey all, I'm prepping for the arrival of 2 knight gobies to my 33 gal tank on thursday, and i want to make sure they have some nice hiding spots with the help of rocks to make caves... i have some old ones from an old cichlid tank, only issue is they are blue and I'm not sure if they look good in the tank.... i know to them it won't matter but i wanted to get some opinions.... here is a pic, i just would rather reuse that to pay for new rock that matches, is it really hideous?