hydrogen sulfide

Mil26 · Apr 23, 2021

(Rotten egg smell) What is the best way to remove this? It is a 25 gallon lagoon started with 20lb of dry rock and 20lbs of live sand. Tank is 1 month old there is no fish tank just finished the cycle 3 days ago 0 ammonia 0 nitrite and there was nitrate at 10ppm just did a 20% waterchange will be doing another 10% tomorrow and another the next day because of the smell. I am running filter floss 90g of marine pure and a small bag of carbon. I also just started using a UV due to cloudy water. Lights are also always off.

People have said that it could have been caused do to stiring the sand bed which sadly I did do but it was about a week ago when I did because I was moving a piece of rock that kept falling but is now secured.

So now I'm just stuck not sure what to do next.

Jekyl · Apr 23, 2021

Run some carbon

Mil26 · Apr 23, 2021

Jekyl said:
Run some carbon

How much should i be running in a 25 gallon? I'm only using the small bag it came with

schuby · Apr 23, 2021

I'd say increase oxygenation and increase flow in tank. Are you running a skimmer and a powerhead?

attiland · Apr 23, 2021

Mil26 said:
(Rotten egg smell) What is the best way to remove this? It is a 25 gallon lagoon started with 20lb of dry rock and 20lbs of live sand. Tank is 1 month old there is no fish tank just finished the cycle 3 days ago 0 ammonia 0 nitrite and there was nitrate at 10ppm just did a 20% waterchange will be doing another 10% tomorrow and another the next day because of the smell. I am running filter floss 90g of marine pure and a small bag of carbon. I also just started using a UV due to cloudy water. Lights are also always off.

People have said that it could have been caused do to stiring the sand bed which sadly I did do but it was about a week ago when I did because I was moving a piece of rock that kept falling but is now secured.

So now I'm just stuck not sure what to do next.

Rotten egg smell indicate ammonia but after 1 month there should be none.
some algae has really bad smell but again your tank is a bit too new for that.
you mentioned cloudy water not long ago so that could be related to your bacterial bloom.
I would do bigger water change like 20-30% and probably carbon in a tennis ball size bag.
you may even get away with just waiting a a week or so.

Mil26 · Apr 23, 2021

schuby said:
I'd say increase oxygenation and increase flow in tank. Are you running a skimmer and a powerhead?

Skimmer no as I was told by many that its not worth it at a tank that size and power head yea I have 1 nero 3 running at 63% (1500) gph

Mil26 · Apr 23, 2021

attiland said:
Rotten egg smell indicate ammonia but after 1 month there should be none.
some algae has really bad smell but again your tank is a bit too new for that.
you mentioned cloudy water not long ago so that could be related to your bacterial bloom.
I would do bigger water change like 20-30% and probably carbon in a tennis ball size bag.
you may even get away with just waiting a a week or so.

Awesome thank you will be getting carbon tomorrow morning! And bump up the water change.