sand substrate and gas

[1 LARA]

I have sand in my 25 and 75 gal and was wondering if anyone with sand releases gas from the sand and how often

 

[stingrays4]

Hi it shouldn't release gasses,unless its getting 'stagnant' and allowing the bacteria to turn anaerobic{the sand will turn black if this is the case in the affected area}

 

[1 LARA]

I have white silica and it has a discoloration in my 75 gal fom algea i think
my 25 is holding its color

 

[mfdrookie516]

Even if it does, its not a big concern. Once it hits oxygenated water, it's no longer harmful

 

[1 LARA]

here are pics of both tanks

 

[stingrays4]

Hi from the photo's its all looking good I would just 'stir' the sand gently with your hand or syphon tube just to release any gas. If you have corydoras then they will probably do this for you naturally

 

[1 LARA]

there are 8 corydora with more on the way and the other fish mostly swordtails and mollys take the sand in their mouth and spit it.
2 Black Mollies
1 Marble Molly
1 Silver molly
10 Swordtails
4 Albino Corydora Cats
4 Pepper Corydora Cats
2 Razbora
6 Neon Tetras
3 Guppies
3 Micky Mouse Platties
4 Zebra Danios
1 Plecostomus

in my 75 gal.
Is the algea that darkened the sand from the pic on the left normal?

 

[boadams87]

I've got trumpet snails in my sand tanks. They burrow down and therefore stir the sand.