How to clean a Betta tank

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Lynxguy
Posts: 4
Joined: Thu Oct 10, 2024 9:08 pm

How to clean a Betta tank

Post by Lynxguy »

My betta tank's getting kinda sketchy, algae on the glass and substrate's dirty. What's the best way to clean it without messing with my fish too much? Got a 5-gallon with a sponge filter, no tankmates.
dawnas
Posts: 2
Joined: Thu Oct 10, 2024 3:52 pm

Re: How to clean a Betta tank

Post by dawnas »

I'd start with a partial water change, maybe 25-30%. Use a gravel vacuum to clean the substrate without disturbing your betta too much. For the algae, a soft sponge or algae scraper works, just avoid chemicals. How often are you doing water changes now?
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zenox_5
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Joined: Tue Sep 10, 2024 6:51 am

Re: How to clean a Betta tank

Post by zenox_5 »

dawnas wrote: Tue Jun 03, 2025 10:21 am I'd start with a partial water change, maybe 25-30%. Use a gravel vacuum to clean the substrate without disturbing your betta too much. For the algae, a soft sponge or algae scraper works, just avoid chemicals. How often are you doing water changes now?
Yep, agree with dawnas. Also, keep the lights on for less time if algae's a problem. Mine's on for 6 hours max.
fluffnut
Posts: 4
Joined: Sun May 14, 2023 6:13 am

Re: How to clean a Betta tank

Post by fluffnut »

If you're using tap water, don't forget to condition it before adding. I made that mistake once and my betta got super stressed. Now I always keep Seachem Prime handy.
fluke
Posts: 3
Joined: Thu Oct 10, 2024 6:59 pm

Re: How to clean a Betta tank

Post by fluke »

yo, just siphon the gunk out, no biggie. bettas are chill with it if you don't go ham. also, cut the light if algae's wildin'.
Lynxguy
Posts: 4
Joined: Thu Oct 10, 2024 9:08 pm

Re: How to clean a Betta tank

Post by Lynxguy »

Thanks for the tips, everyone. Gonna try the gravel vac and reduce the light time. I've been doing weekly changes but might bump it to twice a week if the algae keeps up.
dawnas
Posts: 2
Joined: Thu Oct 10, 2024 3:52 pm

Re: How to clean a Betta tank

Post by dawnas »

Twice a week sounds good if the tank's small. Just monitor your betta's behavior—if they're hiding more or flaring at the vacuum, slow down. Also, check your filter media; sometimes it needs a rinse in tank water to keep flow steady.
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zenox_5
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Joined: Tue Sep 10, 2024 6:51 am

Re: How to clean a Betta tank

Post by zenox_5 »

Yeah, and don't replace all the filter media at once. That's where most of your good bacteria live. Just swish it in old tank water during changes.
fluffnut
Posts: 4
Joined: Sun May 14, 2023 6:13 am

Re: How to clean a Betta tank

Post by fluffnut »

zenox_5 wrote: Tue Jun 03, 2025 2:08 pm Yeah, and don't replace all the filter media at once. That's where most of your good bacteria live. Just swish it in old tank water during changes.
Exactly! I learned that the hard way. Had a mini cycle crash once because I replaced everything. Never again.
fluke
Posts: 3
Joined: Thu Oct 10, 2024 6:59 pm

Re: How to clean a Betta tank

Post by fluke »

bacteria's key, fr. also, if your betta's actin' weird after cleanin', check the temp. sudden changes freak 'em out.
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