Need An Opinion On Plants "pearling" From Roots

[carlos840]

Hi everyone, this is my first post, i started my first tank a month and a half ago, and im slowly getting there...
Im in the middle of cycling (actually im not really, im trying to do things my way, will talk about it if it works, once im sure it did in a month or two!)
I just noticed the other day that my Echinodorus was creating bubbles coming out from the substrate, i was confused, and then i saw that bubbles where escaping from the roots, a small root was coming out of the substrate a few inches away from the plant and i could see a bubble come out every few seconds from the surface of the root!
What is this, and is it supposed to happen? I thought plants where creating Oxygen from their leaves, not roots! (it only happens at the end of the photoperiod after 10 or 11 hours)
Also im getting a little bit of green spot algae on my Anubias, i now have the lights on for 12 hours a day, i know it all depends on nutrients and Co2 levels and balance, but would turning it down to 11hours a day help or at least make difference? Im not putting any kind of Ferts and my substrate is pure Eco complete... I use a DIY Co2 with a ladder and my lights are 2x24w T5 with reflectors on a Lido 120l (original filter to).
Thank you, any input on this would be great.

Charles

 

[Mr Bliss]

Oxygen spreads from the leaves to the roots through the so-called aerenchyma, little air ducts inside the plant. There it diffuses from the roots to the substrate. This allows aquatic plants to grow in anaerobic substrates. Some aquatic plants (Echinodorus in particular) are really good at this, whereas others (such as Anubias and many stem plants) have rather tiny aerenchyma and "weak" roots.

Sometimes you'll never see pearling in the leaves of bigger Echinodorus plants. Instead, there's a steady stream of bubbles from the base of the plant.

 

[carlos840]

Now that i think about it i saw the same thing on my anubias, but not as much!
So this is oxygen coming out, not some strange gas or something?
Its underground pearling...
Any thoughts about the GSA?

Cheers

 

[SuperColey1]

If you mean Green Spot Algae (very common on Anubia leaves) then up the phosphate a bit. You may have to tinker a little to minimise GSA. Too little I get loads. too much it increases a bit so I have to find a happy medium and settle for that.

I never get my Anubias totally free from it.

AC

 

[carlos840]

I dont really want to start fiddling around with phosphat and ferts and stuff like that, is there anything i can do apart from that or should i just accept the fact that they are there and live with it?
Cheers