I just made a DIY python, and I LOVE it. It makes life so much easier. I find that they temperature is really easy to control, my temp out of the faucet stabalizes at a perfect 78 degrees easily. When I dechlorinate I treat for the whole tank directly after adding water, O-man and the shrimps seem to be fine with it, so I dont worry about it too much. I don't really worry about what is being dumped down the drain. I have dumped much worse things down the drain before, not to mention in chemistry classes! The cleanliness thing isn't an issue either, I just sponge it down with hot water and soap, any bacteria get burned off in the cooking process any way, and I dont know about you but I dont put cooked food down in the sink anyway. As for the dissolved O2 content, are we sure the dissolved content is that much lower out of the sink? I often think it must be higher, due to the huge amount if air being mixed with the water at the tap. It is evident that it doesnt bother the fish (and trust me Oscar would tell me) so I don't worry about it. If i had to use five gallon buckets and lug it to the toilet, I would be doing that about 15 times, and it would take me hours. I'm really happy with the DIY python!