You can also use paper towels, non adhesive shelf liner, and then tile (my preferred choice).
Other than just causing impaction the substrate she is currently on can also cut up her eyes, feet and insides as its actually quite sharp.
Particle substrates can also cause fungal infections, eye infections, scale rot, joint issues, sometimes stained scales, prolapses, death and it also provides a place for bacteria to breed so even with spot cleaning its never clean.
Definitely get rid of the red light, beardies see in color so having it on disturbs their sleep. If it drops below 65 during the night then you can use a ceramic heat emitter (CHE) as this produces only heat.
For during the day make sure you have a bright white non colored regular basking bulb. You can also use halogen and flood lights instead of reptile branded bulbs.
Temperatures should be monitored with a temp gun or a digital temperature gauge with a probe.
Basking spot 100-110.
Warm side 88-95.
Cool side 70-85.
Night time temps 65-85.
Make sure at minimum she has a 75 gallon. 40-50 gallon tanks don't exactly work for adult dragons, after all they usually are 18-24 inches in length and are semi-aboral and active lizards.
With 40-50 gallons you provide a place for food, basking, sleeping and thermoregulation... but thats about it, they don't have much room for exploring or climbing or multiple basking areas.
With a 75 gallon or larger enclosure however you provide a sleeping place, basking area or areas, food area, thermoregulation, climbing space, and exploring space. You also can provide a better variety of UVB levels in a larger enclosure.
Luckily 75 gallons aren't too expensive if you go to petco during their one dollar per gallon sale. They're usually about 97 dollars.
This is a little list of UVB bulbs and fixtures. I'd recommend getting a 34" bulb and fixture and a 10.0 at the very least. However the 14% bulb would be a bit stronger.
https://www.amazon.com/gp/product/B013RNBXLQ/ref=oh_aui_detailpage_o00_s01?ie=UTF8&psc=1
^ 46" T5 HO Fixture
https://www.amazon.com/Reptile-T5HO-Standard-Fixture-Reflector/dp/B01B209YQC/ref=sr_1_5?s=pet-supplies&ie=UTF8&qid=1523586973&sr=1-5&keywords=t5+ho+fixture
^ 34" T5 HO Fixture
https://www.amazon.com/Zoo-Med-26062-Reptisun-Fluorescent/dp/B00AQU8HKO/ref=pd_bxgy_199_img_2?_encoding=UTF8&pd_rd_i=B00AQU8HKO&pd_rd_r=ZNH52XHETCP3Y7K5FGA2&pd_rd_w=GIi1G&pd_rd_wg=oAEwd&psc=1&refRID=ZNH52XHETCP3Y7K5FGA2&dpID=31QDwNV8eSL&preST=_SY300_QL70_&dpSrc=detail
^ 34" T5 HO 10.0
https://www.amazon.com/ZooMed-Zoo-Med-ReptiSun-Output/dp/B00AQU8HRM/ref=pd_bxgy_201_img_2?_encoding=UTF8&pd_rd_i=B00AQU8HRM&pd_rd_r=R1ZX884J9P08VVS6YN6C&pd_rd_w=l58nu&pd_rd_wg=ZeSJJ&psc=1&refRID=R1ZX884J9P08VVS6YN6C
^ 46" T5 HO 10.0
http://www.lightyourreptiles.com/arcadia-d3-ho-t5-14-uvb-dragon-lamp-34-inch/
^ 34" T5 HO 14%
http://www.lightyourreptiles.com/arcadia-d3-ho-t5-14-uvb-dragon-lamp-46-inch/
^ 46" T5 HO 14%
Feeding guide.
All life stages eat 10-20 bugs a feeding.
1-4 months 3x a day.
4-12 months 2x a day.
12-20 months once a day.
20+ months twice a week at the least, every other day at the most.
Staple feeders - Crickets, locusts, grasshoppers, silkworms, black soldier fly larvae, dubia roaches, turkish roaches, possibly earthworms.
Treat feeders - Waxworms, hornworms, superworms, mealworms, butterworms.
Wax worms - once a week, 4-5 max.
Hornworms - every other day to every two days, 4-6 max.
Mealworms - every other day to every two days, 5-10 max. Only for beardies above 6 months.
Superworms - once or twice a week, 3-4 max. Only for beardies above 12 months.
Butterworms - once or twice a week, 3-4 max.
Daily greens- Turnip/collard/mustard greens, endive, and kale if added to a mixture of the other staple greens mentioned.
Fruit once or twice a week - Banana, strawberries, blueberries, blackberries, red raspberries.
For more food items -
http://www.thebeardeddragon.org/bearded
http://www.beautifuldragons.com/Nutrition.html
You want two supplements at the very least, a calcium and a multivitamin.
Generally beardies below two years need calcium 5x a week and multivitamins 2x a week.
However beardies above two years or at two years of age need calcium only 2-4x a week with
multivitamins 1-2x a week.
This depends on how your adult beardie is with diet, health, just laid eggs, is laying eggs, etc.
And
care sheet,
https://docs.google.com/document/d/18PfjxbgD95KLcfRCqGAVz-ViuMPuP4AvgGBSZzPKRgc/edit?usp=sharing