I have 5 ducklings that Tractor Supply said were Mallards. They were 1 1/2 weeks old when I got them and I have now had them 8 days. There current age would be approx 2 1/2 weeks. Now the questions: 1st. What temperature should I keep their indoor swimming pool? The air temp stays around 77 degrees. They have free run of the room they are in. It has a heat lamp mounted at their duck house. And I baby proofed it to keep them out of dangerous places. 2. Outdoors they have a 20 foot by 24 ft enclosed house also with pool. This house temperature changes with the weather, meaning it got down to 55 degrees in there last night and temperature will rise inside as outside temp climbs. So what temperature do ducks like on the low end and then what is the max temp they are comfortable? Currently they stay inside until I am sure about temperature fluctuation. 3. Is it normal for them to swim under water a LOT? They seem to do more diving/underwater swimming than top water. As you can see most of my questions are about water and temperatures. I have had them a pool since the day I got them and I just want to make sure I am not missing anything. I worry about them a lot probably too much. I am not sure if they should be left unsupervised at this point. Thank you for any help in this area. P.S. I am neurotic about the water being clean so it is changed atleast once a day sometimes more.