Bill,
1. Yes, two of them. Placed in about 6' of water. I plan to move them a little more shallow before winter time.
2. The deepest point is 9.5'. The average depth is 6.5'
3. No, I do have a make shift one I use.
4. No dye, I drink from this pond and I cannot find anything is considered safe for humans. I do know that several charcoal filters say they pull it out but I am still debating if the benefits of dye out weigh the risks.
5. I am not entire sure what plants are in there. I know some Cattails have taken hold, I do not want these. I pull as much as I can. Some Rushes is near the shallows. I'm sure there's others, I just do not know the names.