To Have and to Hold Back - S3-E13
Corrected entry: Lewis gets a scholarship to study science in the U.S. but was at risk of failing science earlier in the season. Even the fact that he was at risk of failing is a plot hole because he is obviously fascinated with science throughout the whole series.
Corrected entry: When Cleo sprays Zane with the fire hydrant, she unscrews the hydrant's cap. She shouldn't be able to do this because she controls water, not objects.
Correction: Even though she only moves water there is water inside it so she is able to control anything that had to do with water. Just like in the episode where Charlotte gets her powers and shows them she didn't only move the water, at first she moves the vase then the flowers start to move, then she moves the water.
Corrected entry: The girls say they hold their breath underwater for fifteen minutes. Why do they need to hold their breath at all? Aren't they mermaids?
Correction: As they do not have gills they wouldn't be able to breathe underwater.
Moon Spell - S1-E7
Corrected entry: In the episode "Pool Party", Lewis cannot lift Cleo in mermaid form because of her weight. But in this episode, the girls are able to push Emma around on a wheelchair in mermaid form without breaking sweat.
Correction: Lifting someone, and pushing them in a wheelchair are two entirely different things. I can't lift my 600 pound motorcycle off the ground, without straining really hard, but I can wheel it around with very little effort.
Correction: Being fascinated with science or even getting a scholarship doesn't preclude a student from being at risk to fail. Many very bright and capable students struggle getting good grades when they don't complete assignments, have any behavior issues, don't do their class work, etc, especially if they find the pace of the class too slow.
Bishop73