The Texas I posted on page one is blind as a bat. He can barley see, runs into everything has trouble seeing food it's sad. He is in a 75G with a pleco, a convict, and a giant danio everyone gets along just fine, partly because even if he wanted to be aggressive he couldn't because he is so blind. I change the water atleast once a week twice if I can. usually around 50% or so. The tank get's really dirty fast because of the pleco.