Uploaded April 2026 | Updated September 2026, 1 hour ago
You know that crusty white buildup on your aquarium lid and rim? 😬 Those hard water stains (aka calcium or mineral deposits) are often caused by splashing or sponge filter bubbles popping at the surface — but I’ve found a couple of simple ways to prevent it.
Follow along as I first show you how I clean off the hard water stains from my glass lid and plastic aquarium rim, as well as how the 2 methods I’ve used to try to stop the buildup from happening in the first place. None of these methods are perfect though, so let me know down in the comments if you’ve found a better technique to prevent hard water stains!
🐟 MATERIALS I USED
(As an Amazon Associate, I may earn commissions from the links below. I’m not sponsored by the other companies.)
▶ White vinegar: amzn.to/4mA3S9K
▶ 6-inch razor blade: amzn.to/4mMXY5c
▶ Black plastic folder: amzn.to/4cvnmrv
▶ Easy Flow sponge filter: aquariumcoop.com/products/aquarium-co-op-coarse-sponge-filter
▶ Airline tubing: aquariumcoop.com/products/aquarium-co-op-black-airline-tubing
▶ Oral syringe: amzn.to/4sFqUh7
🌿 RESOURCES
▶ 5 Hacks to Make the PERFECT Sponge Filter: youtu.be/OQ1k6DfbKiw?si=kQybUYx24ym3r788
▶ Get Rid of Black Beard Algae on Sponge Filters: youtu.be/IM1-d_ZbKcM?si=Wow9pH01LNB44KdI
🦐 EXTRAS
▶ Members Only content: youtube.com/channel/UCNoNEF64ijgxK6OSTwdHOFA/join
▶ Instagram: instagram.com/girltalksfish
▶ Merch store: girltalksfish.creator-spring.com
ATTRIBUTION
Music from Epidemic Sound: epidemicsound.com/referral/2earpi (if you use my referral link, I get 1 month free 😀)
#girltalksfish #nanofish #plantedaquarium
0:00 Why hard water stains keep happening (and why I hate it 😅)
0:32 Easiest way to remove hard water stains (vinegar method)
1:47 Why plastic rims on aquariums are hard to clean
2:53 Prevention Method #1: DIY sponge filter “umbrella”
4:18 Prevention Method #2: curved uplift tube on sponge filter
5:20 How to fix an Easy Flow sponge filter with slow bubble flow
6:22 Your tips + more sponge filter hacks
You know that crusty white buildup on your aquarium lid and rim? 😬 Those hard water stains (aka calcium or mineral deposits) are often caused by splashing or sponge filter bubbles popping at the surface — but I’ve found a couple of simple ways to prevent it.
Follow along as I first show you how I clean off the hard water stains from my glass lid and plastic aquarium rim, as well as how the 2 methods I’ve used to try to stop the buildup from happening in the first place. None of these methods are perfect though, so let me know down in the comments if you’ve found a better technique to prevent hard water stains!
🐟 MATERIALS I USED
(As an Amazon Associate, I may earn commissions from the links below. I’m not sponsored by the other companies.)
▶ White vinegar: amzn.to/4mA3S9K
▶ 6-inch razor blade: amzn.to/4mMXY5c
▶ Black plastic folder: amzn.to/4cvnmrv
▶ Easy Flow sponge filter: aquariumcoop.com/products/aquarium-co-op-coarse-sponge-filter
▶ Airline tubing: aquariumcoop.com/products/aquarium-co-op-black-airline-tubing
▶ Oral syringe: amzn.to/4sFqUh7
🌿 RESOURCES
▶ 5 Hacks to Make the PERFECT Sponge Filter: youtu.be/OQ1k6DfbKiw?si=kQybUYx24ym3r788
▶ Get Rid of Black Beard Algae on Sponge Filters: youtu.be/IM1-d_ZbKcM?si=Wow9pH01LNB44KdI
🦐 EXTRAS
▶ Members Only content: youtube.com/channel/UCNoNEF64ijgxK6OSTwdHOFA/join
▶ Instagram: instagram.com/girltalksfish
▶ Merch store: girltalksfish.creator-spring.com
ATTRIBUTION
Music from Epidemic Sound: epidemicsound.com/referral/2earpi (if you use my referral link, I get 1 month free 😀)
#girltalksfish #nanofish #plantedaquarium
0:00 Why hard water stains keep happening (and why I hate it 😅)
0:32 Easiest way to remove hard water stains (vinegar method)
1:47 Why plastic rims on aquariums are hard to clean
2:53 Prevention Method #1: DIY sponge filter “umbrella”
4:18 Prevention Method #2: curved uplift tube on sponge filter
5:20 How to fix an Easy Flow sponge filter with slow bubble flow
6:22 Your tips + more sponge filter hacks
