Feeding monitors anything other than whole foods is like breasts without nipples...pointless. When feeding whole animals your are giving complete nutrition in a manner far superior to supplemented parts. Examples whole chicken good, breasts inferior. Fish fillets are inferior to whole fish. Ditch the mealies and crix. Good feeders are snails, rodents, small birds, roaches, small fich (Not Goldfish), silkworms and hornworms. All should be fed live. A healthy monitor that is physiologically ready to eat, healthy and suffuiciently housed will not have problems eating anything live. Make sure the food item is appropriately sized and if you must leave it unattended make sure the feeders have food also. Then again of the monitor wont eat immediately its not hungry or something else isnt right.
I prefer basking spots that use lower wattages in a row rather than one bulb for basking spots. You can use stacks or angled upwards objects to create a basking spot gradient. My basking spots average 140 degrees or more Farenheit. Basically there are three zones warm end, cool end, and basking spot. Warm end and cool end are ambient aka air temperatures while the basking spot is a surface temperature.
Substrate should be dirt that will hold a burrow it digs into it, retain moisture without getting soggy and be something that the monitor recognizes as such.
The cage shpuld be designed to be able to retain humidity. Vents on the warm end down low and up high on the cool end help retain humidity better than venting up high on the warm end, also provides airflow across the enclosure.
Watch the monitor to tell you what needs to be adjusted. For exampe if it tries to get as close as possible to the basking lights you need to increase the basking temps. If it stays on the cool side a large part of the time cage might be too warm, if on the warm end all the time then its too cold. The advantages of higher basking spot temps are less time spent basking, and more efficient metabolization of food. Fat monitors are ones that dont have sufficiently high basking temps. Cool end about 65 degrees warm end about 86 degrees farenheit.
Digby Rigby
balboa28279@mypacks.net
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My feeders are cooler than your pets