Hi everyone, I'm rather new to fishlore and had a question on whether or not I overstocked my tank. I have 1 albino Bristlenose Pleco, 3 Guppies (1:2 M:F), and one very old, one-eyed Black Skirt Tetra. The pleco is just a baby and will probably relocate him once he gets to 2 - 2 1/2 inches. So I have a couple questions regarding this set up. 1. Is the Tetra okay by himself? They have a reputation to nip guppies but he has one eye and seems to keep to himself. 2. Is it mean to keep the tetra like this? I'm afraid that he will be picked on if I put him with his own kind like he was before. 3. will he eventually become aggressive towards the guppies? 4. is this over-stocked?