I have had a problem with my hygrophila for the past two months or so. At first, I blamed it on a deficiency. But I've been doing EI and probably overdosing everything for a while, at least three or four weeks, but the issue hasn't changed. The leaves look like they have pieces missing from them. Well the other day I was sitting there watching my tank out of the corner of my eye, and suddenly it dawned on me that one of my juvenile angelfish was actively trying to take a chunk out of a hygro leaf. I've seen them playing with floating leaves a few times before, but never actually seen them attacking a leaf attached to a plant. Could this be the issue with my plants? I also have three oto's in the tank, would they eat my hygro if they didn't have enough algae to keep them busy? I cut back on the photoperiod a bit when my hygro started looking funny, since there is also some algae growing on some of it too. Maybe I'm not growing enough algae for the oto's. I've had the angelfish for maybe four months, they are not full grown yet. This would have been my last guess, first would be deficiencies, but I'm dosing everything and it's not co2 or light (I've seen co2 deficiencies before on this plant...this isn't it; and I've had lots of photoperiod changes too, with no obvious effects on this plant before other than increased or slowed growth).