Random bubbles?

[cdemoss01]

Hello,
was just doing mantinence on my 65 gallon brushing rocks etc cleaning off power heads. Until one of my very unstable rocks which I do not know how to fix started to tip. I set it back up with out it hitting the wall etc. Suddenly I hear a big bubble like if someone was blowing a straw into my tank... Then I saw a bunch of small bubbles coming out of one of my rocks with a bunch of snails on it. What in the world was this?

 

[vetteguy53081]

Hello,
was just doing mantinence on my 65 gallon brushing rocks etc cleaning off power heads. Until one of my very unstable rocks which I do not know how to fix started to tip. I set it back up with out it hitting the wall etc. Suddenly I hear a big bubble like if someone was blowing a straw into my tank... Then I saw a bunch of small bubbles coming out of one of my rocks with a bunch of snails on it. What in the world was this?

May be gases within the sandbed. Be sure to siphon periodically if this is the case

 

[cdemoss01]

May be gases within the sandbed. Be sure to siphon periodically if this is the case

Nothing to worry about?

 

[vetteguy53081]

Nothing to worry about?

Should not be, Likely nitrogen. To confirm, run a stick or plastic rod gently through bedding and see if bubbles rise, then you know