bubbles?

[match55]

sometimes there are some small bubbles flowing on the surface of my tank.
anyone know whats happening to my tank?
I only have puffer and 9hermits in there tank, and the paraM is fine except the nirate is still 15.
temp 79~82
light on for 9hours/day
no over feed.
have a mangrove seeding on the tank.

is it a sign that I need to clean something?
I just cleaned the skimmer and a powerhead 2days ago

 

[melosu58]

Does it look like a sheen on top of the water?

 

[match55]

Does it look like a sheen on top of the water?

nope it actually small white bubbles gathering at the corner and edge on the surface

is that mean something is sick in my tank??

 

[juice28]

i had that happen when AI switched from crushed coral to live sand, i guess it was the tiny "dust" particles from the sand that had not been filtered out yet but that is the only time ive ever had white bubbles....

 

[match55]

i had that happen when AI switched from crushed coral to live sand, i guess it was the tiny "dust" particles from the sand that had not been filtered out yet but that is the only time ive ever had white bubbles....

oh thats probably the reason, cuz the bubbles usually show up after I stir the sand a little bit.
I will keep my eyes on tho, hope nothing is sick in my tank.

thanks guys ^^

 

[juice28]

thats probably it, i try not to stir up my sand be i might angle a powerhead to increse flow over it to pick up some of the trash(the corals seem to like it) but i dont literally stir it up but thats just me lol im still novice in the hobby