Originally Posted by aunt kymmie
Will someone help me with an outbreak of cyano I'm experiencing? I'm not sure what I can do other than manually remove it. I'd also like to know what caused it??
(San Diego's famous "hard as concrete" tap water)
Lighting: 130 watts CFL 6500K over a 100gl, 12 hours on/ 12 hours off (bulbs are replaced every six months) Seachem's Flourish Comprehensive weekly, Seachem's root tabs every two months (under the heavy root feeders)
This tank has been set up for 2+ years and this is the first time I've had this type of problem.
Were this my tank, I would consider a good pruning of existing plant's to encourage new growth. I say this due to the belief that as plant's grow to maturity the growth may slow, and heavy plant mass could also inhibit new growth by blocking light and discouraging new growth at the substrate as well as further up the plant.
Where plant's are thriving,growing, they can utilize the available nutrient's,light ,(if unobstructed) and available CO2 and Algae which I believe Cyno is a form of,,struggles.Therefore it makes sense to me that continued growth of plant's will help inhibit the growth of various froms of algae.
As plant mass get's larger, and little or no more growth is seen or slows,,flow or circulation around the plant's ,as well as the base of plant's ,could become obstructed. Then, it is possible that oxygen levels at the substrtate could be lower due to organics,detritus ,that settle around the base of large plant mass where it is difficult to remove.
Where plant's are thriving ,most forms of algae stuggle as I understand it.
On the flip side,, If lighting is there,along with nutrients,and even low levels of CO2 such as that produced by organic break down, and by fish,, but plant mass is small or few,,then various forms of algae will find condition's to their liking.(might reduce photo period )
Hence,were it me... I would perform a significant pruning of existing plant's to encourage new growth,or in the event pant's were few,,add more and after large pruning,, planting,, perform large water change.
Have heard of antibiotic Erythromycin used to erradicate the Cyno but as I understand it also compromises the biological filter. I might be willing to try this as last resort .
(Disclaimer).. All of the above is merely my opinion and I am no authority on plants. (not by a long shot), Just offering things that I might consider with my tanks,my plant's.