Algae in my ADF tank

Lcc86

Fish Herder
Joined
Jun 7, 2023
Messages
1,044
Reaction score
682
Location
England
Hi all

Am having issues with some stubborn algae in my african dwarf frog tank. It's a 6 and a bit gallon heavily planted tank with 3 ADF's and some neocaridina shrimp (maybe 10 max). They've been in here for coming up to a year and the algae issue started about 3 months ago?

It's that annoying string algae that seems to get everywhere. I use a toothbrush to manually remove from the glass, decor, and plants. I've tried blackouts for a week which help but then it comes back. I've tried Flourish Excel which helps but again it comes back. I don't overfeed the tank, the frogs get live food and I feed via a pipette so there's very little, if any, wastage. Feeding routine is usually 3 days followed by either 1 or 2 days of no food. I also don't supplement the shrimps diet given how much algae there is.

The tank was quite mulmy at one point so I vacuumed it thoroughly which helped but I can't seem to get rid of the algae completely.

Lights are routinely on for 7 hours a day if I'm not doing a blackout, and the tank is next to my other nano tank which gets no algae whatsoever! The light is the one that came with the tank (Superfish Quadro 40).

Maintenance routine is 70% water change every 7 days, that's also when I scrub everything to try and get rid of the algae.

I did wonder if perhaps lack of water circulation might be allowing the algae to thrive, as it's worse on the opposite corner to where the filter is. I didn't use the filter that came with the tank as the outlet is big enough for a frog to get sucked in so I didn’t trust it. The filter is actually rated for a 30g, I swapped it over when I downsized, and added some tubing on the outlet to calm the flow down. Without the tubing the frogs get blown around all over the place as it's so powerful so it's definitely needed.

I've attached some pics of it today, this is after a 4 day blackout and treatment with Flourish Excel. It's still hanging on stubbornly. Because the tank has amphibians I'm not sure about trying other chemical treatments, I've heard Flourish isn't even that good for them so I've been trying to avoid dosing as much as possible.

Just wondering if anyone has any other ideas? Would running an air pump in the worst-affected corner help?
 

Attachments

  • 20250506_071342.jpg
    20250506_071342.jpg
    341.8 KB · Views: 12
  • 20250506_071349.jpg
    20250506_071349.jpg
    290.3 KB · Views: 8
  • 20250506_071353.jpg
    20250506_071353.jpg
    391.6 KB · Views: 8
  • 20250506_071408.jpg
    20250506_071408.jpg
    298.2 KB · Views: 8
amphibians pollute the water more than fish, I'd suggest doubling your water changes frequency, or adding a specialized feeder or two... these new blue berry, or orange river snails are heavy hair algae eaters, and are colorful, and are live bearers, that only have 1 baby at a time, so they won't over run your tank... there are fish like panda garras, that are voracious algae eaters, but I'd avoid them, on a tank that size...

another thing to consider, is nitrates in your ground water??? I'm in an agricultural area, with higher percentages of agricultural chemicals in my ground water, so I'm using RO water for water changes... if your water is similar, changing water daily, will not stop algae, if it's getting what it needs from your tap water...

but assuming you have other tanks, and if algae is not a problem for them, maybe try twice a week water changes, in your frog tank
 
Last edited:
amphibians pollute the water more than fish, I'd suggest doubling your water changes frequency, or adding a specialized feeder or two... these new blue berry, or orange river snails are heavy hair algae eaters, and are colorful, and are live bearers, that only have 1 baby at a time, so they won't over run your tank... there are fish like panda garras, that are voracious algae eaters, but I'd avoid them, on a tank that size...

another thing to consider, is nitrates in your ground water??? I'm in an agricultural area, with higher percentages of agricultural chemicals in my ground water, so I'm using RO water for water changes... if your water is similar, changing water daily, will not stop algae, if it's getting what it needs from your tap water...

but assuming you have other tanks, and if algae is not a problem for them, maybe try twice a week water changes, in your frog tank
Thanks I'll up the water changes and see how we go. Just seems weird that it's happened now when I've had them in there for quite a long time. Deffo wouldn't be looking to add any fish as algae eaters as I know that is never a guarantee and also as you say there's no room! Least it's a small tank so maintenance is nice and simple.

I'm also using RO water as my water is super hard and my fish is soft water too so I just use the same mix for the two different tanks.
 
Where the tank in relation to the window. Could it be as simple as different sunlight angle with the change of seasons.
 
Where the tank in relation to the window. Could it be as simple as different sunlight angle with the change of seasons.
The window is to the rear of the tank, there is a tree blocking some of the light but perhaps with the sun being lower it's hitting a bit more of the tank as the window is south-facing.
 
I would cover the rear glass wall of the tank. I use black vinyl on all my tanks.
 
Thanks, I haven't got any vinyl but I've got some brown paper I could cut to size as a temporary measure while I source some
You can use any dark material. I use vinyl with a sticky backing in case it gets wet. I purchased it on Amazon.
 

Most reactions

Back
Top