Cyano and air bubbles coming from substrate.

[Noodles]

Two posts in two days, not a good week. I've had a problem with red cyano on my fine gravel bed for a few weeks and eventually it covered the whole of the substrate. I checked water parameters and all checked out fine. I use ro water and do regular water changes. I have started using rowa phos and the cyano has started to recede a bit.think my turbo and hermits have eaten it a bit( which I didn't think they did.) I recently upgraded the light from two t5's

 

[Noodles]

Sorry forgot to finish message, I just recently upgraded my light fro 2x t5 's and are running them and a halogen one now. Although I have been weening my corals on to the halogen light.
But recently the last two days there has been a lot of bubbles on the substrate,live rock and cyano, is this good or bad?

 

[chenzo9999]

Is the RO water also DI - it is important to have both RO/DI too make sure the Phosphates are not in there.

One way that may be able to distinguish is a TDS meter.

 

[Noodles]

I will have to check that with the lfs .is the bubbles from phosphates leaching out

 

[chenzo9999]

Sometime bubbles are released as a wast product from algae - Usually Nitrogen, which is not harmful.

The algae growth is caused by phosphates

 

[Mannydouhnut]

This is common with fine sand I used to have this problem when I was willing to deal with all the problems fine sand causes. I found this happened when I didn't have enough flow.

 

[Ausfish]

Sometime bubbles are released as a wast product from algae - Usually Nitrogen, which is not harmful.

The algae growth is caused by phosphates

I have 2-3mm substrate and had the same issue at the beginning of the cycle. I believe depending on the nutrients the cyano grows off it releases gases or now.

Just saying it can also happen with course sand/substrate.

 

[bavass]

I would invest in a RO/DI unit that way you know the TDS is zero. Then treat the tank like you have high NO3&PO4