Well your spray system most be in new condition always. You must be perfect when you spray. Because our guns drip sometimes, and our tires sometimes end up with spray on them. I would not want anyones tank mix in any lake/ocean.I have done this for the past 4 years without distroying the ecosystem here in Maine. I say if your sprayer leaks or you dont have the brains to not have chemicals banging around, then yes its wrong. otherwise, nice boat!