Is there a downside to leaving in a collard green leaf almost constantly, as long as it's changed twice a day? I wouldn't do it with any high phosphorus veggies, and definitely not fish food or snail jello...but my biggest snail eats from a fresh (not blanched) collard green leaf I've clipped in on and off throughout the entire day. It's keeps him mostly off my plants and he's a voracious plant eater. My nitrite and ammonia levels are still zero, and it's been about 24 hours with the leaf changed every 12. Just want to make sure it isn't harmful, since most people seem to feed only at night.