 Well, good. They've got some standards there as far as grapefruits. But, yes, well, I definitely see the challenge in keeping these little guys out of your koi pond. But as much as you can, I'd say keep them away from that algae. And, hey, if they like the fruit, vegetables, all that well rounds out the diet there. This is Dr. Debbie. If you have a question, give us a call. We're here at 1-866-405-8405.