The most frequent comments I get is "I wish undergravel filters worked with sand" or "How do I use an UGF with sand". Unfortunately, the solution can't be bought, so we have to make our own DIY Under gravel filter. This is one way to skin the cat; another easy way would be to use the inter-linkable UGF tiles and throw a weed fabric barrier across that and you can safe yourself the hassle of making your own. But again, I am using what I have around me and it might not be the cheapest for you to buy or the least amount of time to put together but hopefully this serves as some inspiration for you to have the confidence to make you own undergravel filter.
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Everything I use to make videos
Camera
Iphone 12 Mini: https://amzn.to/3nL4BHd
Microphones
Rode Video Micro (shotgun mic): https://amzn.to/2Y5p6Wo
TRS to TRSS (necessary for microphone to phone 3.5 audio jack): https://amzn.to/2ZGkBlC
Rode Wireless Go 2: https://amzn.to/3mtyxZ5
Rode Wireless Go 2 adapter to lightning: https://www.bhphotovideo.com/c/product/1602040-REG/rode_sc15_300mm_lightning_to_usb_c.html
Deity Lavalier Microphone: https://amzn.to/2ZGkBlC
Phone Holders
DJI OM 4 (Smartphone Gimbal): https://amzn.to/2ZEBI7N
Stationary Phone Stand: https://amzn.to/3GGX1G8
Flexible Tripod Legs: https://amzn.to/3myHcJT
Laptop for Editing
MacBook Pro 2017: https://amzn.to/3Bv040r
Editting Software:
iMovie
Davinci Resolve 17