I did not see your previous post/cage, so I will just base my comments on the enclosure in this picture. You obviously put some work into the cage and that is great. However, there are some things I would advise.
How big is this enclosure? It appears to be 4 x 2 x 2.5 or 3. You mention 6 feet. Is it 6 feet long or 6 square feet of ground? Pictures can be misleading so it would be good to inform what the length of that cage is. If it is only 3 - 4 feet long, then your monitor will outgrow it and you will need to build another cage. Even now, a 4 foot cage is probably not long enough to keep the monitor really happy or healthy.
Your substrate is not really deep enough. Ideally the monitor should be able to get into the substrate. Not all monitors will go into the substrate, but it is a good idea to have that ability. Rather than buying stuff at a pet store and spending lots of money, go to a home improvement store (Lowes, Home Depot, Menards, or any gardening store). Buy yourself a few big bags of cypress mulch. It costs anywhere from $2 - $5 for a big bag (2.2 or 3.3 cubic feet). Add the mulch to the enclosure. Some people here dislike cypress mulch, but I have used it for 6 years now or so and I think it works very well. I have raised several water monitors on it from birth to adulthood on it.
The next concern about your enclosure is the water bowl. You have a fully screened top. I am not as opposed to screened tops as others are, but I do acknowledge that there are some additional things a fully screened top requires. One of those things is a deep substrate, which you currently do not have. The second thing is a water container that the animal can completely fit inside. You can go to the same home improvement store and buy a plastic rubbermaid container. You can use the colored ones or get one of the translucent plastic ones. Whichever you get, make sure 1. it is large enough for the animal to fully fit inside, and 2. has handles so you can lift it easily. Nothing sucks worse than fighting with a water container!.
Next, you may want to make some effort at sealing the wood, at least on the bottom. As he spills water or you mist him or anything else, that water will sink to the bottom of the wood. It will rot out the bottom. That will cause structural issues with the cage as well as ruin your carpet below. Trust me... I did that and my carpet is shot.
If you cannot find cypress mulch (or even if you can), add more branches or logs. Having only one looks clean and neat, but it probably is not doing much for the monitor. The more branches, the more places he can hide. The more places he can hide, the more secure he will feel. The more secure he feels, the more likely he is to remain healthy.
Another thing you can do is add substrate and add a piece of plywood on top of the substrate. The monitor will dig under the board, excavate a little chamber, and use that as a hide.
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^x^ Bloodbat ^x^
Monitors, monitors everywhere
and all the food they ate.
Monitors, monitors everywhere,
their parents loved to mate.