Petco Text Logo
Petco Pet Logo

  • Two Easy Ways to Start Earning Rewards!

Why is there green algae growing on my red ear slider's shell?

Updated On September 23rd, 2025

Pet's info: Amphibian | Unknown - Amphibian | Male | unneutered

I have 2 red ear sliders 7mos old. will they have like algae on their backs? or I think that's what it is, it's green it's not much but they are little.

2 Answers

Most Helpful Answer

Image profile

Answered By Angel Alvarado, LVT

Licensed Veterinary Technician

Published on January 31st, 2018

Sometimes a bit of algae will grow if water quality is not optimal, there is too much light or you are overfeeding. You can gently scrub the shells with a soft bristled brush. Scrub tank walls and tank furniture then perform a partial water change. Rinse the filter media with some tank water, not tap water. Limit light to no more than 8 hours daily and remove any uneaten food every day. Maintain water temperature between 75F and 86F. Any warmer and it can foster algae overgrowth. You can refer to the article at the link below for information regarding care. http://www.anapsid.org/reslider.html

Vote icon

1Pet Parents found this answer helpful

Other Answers

  • Image profile

    Answered By Angel Alvarado, LVT

    Licensed Veterinary Technician

    Published on November 3rd, 2017

    Use a soft bristled toothbrush and some diluted Betadine or chlorhexidine solution to gently scrub the shell. Do this daily and dry dock (keep her out of the water) her about an hour or two after each scrubbing. Check water quality and filtration. Rinse filter media with tank water and perform a water change (20-30%) if necessary. Make sure the filter is producing a moderate current to prevent stagnation. Use a timer to limit the photo period to 10-12 hours daily. Adjust the water heater if necessary. Too much light and heat can cause algae overgrowth.

    Vote icon

    1Pet Parents found this answer helpful

See More Answers

Related Questions

Petco Pet Education Center
Health & Wellbeing
What to do if my cat has a small hole with pus coming from its ear?
Is your cat's ear hole oozing pus? A Petco vet explains potential infections like abscesses from bites, advising immediate vet care, antibiotics, and recovery.
Updated on September 23, 2025
Petco Pet Education Center
Health & Wellbeing
My pet keeps scratching its ear. What's causing this problem?
Is your pet scratching their ear often? A certified Petco veterinarian explains common causes like otitis or infection and how to identify the problem.
Updated on December 04, 2025
Petco Pet Education Center
Health & Wellbeing
My pet's ear mite treatment isn't working. What else could it be?
Pet still itching after treatment? A Petco vet clarifies it may not be ear mites. Discover effective solutions like Revolution or consulting an exotic vet.
Updated on December 04, 2025
Petco Pet Education Center
Health & Wellbeing
My cat has a growth on its ear. Is it serious or an old injury?
Noticed a growth on your cat's ear? A certified vet explains causes, from cysts to melanoma, and recommends diagnostic steps. Get expert guidance now.
Updated on September 23, 2025
Petco Pet Education Center
Health & Wellbeing
Why does my dog smell like a dirty belly button? Is it anal glands?
Does your cat smell like a dirty belly button, even after vet visits for ear mites and anal glands? A Petco vet offers insights on persistent odors.
Updated on September 23, 2025
Petco Pet Education Center
New Pet
My 43-day-old kitten isn't gaining weight. Is it time to wean?
Is your 43-day-old kitten not gaining weight? A certified vet explains why milk isn't enough and guides proper weaning to solid food for healthy growth.
Updated on September 23, 2025
image
Have A Vet Question?

Book an appointment with the pros – our expert vets are here to help.

Book Now

Sponsored