Review on 5-in-1 Aquarium Gravel Cleaner Water Changer Glass Scraper Fish Tank Sand Wash Pump Kit with Air-Pressing Button and Adjustable Water Flow Controller Clamp for Effective Fish Tank Gravel Cleaning by Ronda Allen

I needed a good gravel cleaner to get rid of layered dirt. This one was very efficient, but you also have to plan for a big water change because unlike other vacuums that settle the waste in a bag, this one just sucks it up by gravity, taking a large amount of water with it and depositing it a bucket (not included) . It was a 75 gallon tank that I cleaned and I estimate I had to replace 10-15 gallons before the cleaning was complete.