Hi. My anubias plants have some holes and scratches on their leaves, can nitrite snails do that or this is some nutrients deficiency?
I have 2 very small (2cm) Bristle nose plecos. can direct hit of co2 bubbles from defuser make such damage?Most of that looks like plant damage. Do you have a pleco? I've seen them cause major damage like that. I don't think Nerites would do that, but I'm not positive.