HAve you ever seeded the sand with live sand that would have fauna that are
actually found in deep sand beds? Some of the various worms that provide path
ways for the 'nasties" to make it down to the deeper parts of the sand bed
where denitrifacation occours? MAny people like to let the critters from the
rock seed their sand bed, but IMO those critters cant do the job alone. (Im not
even gonna mention the bagged live sand) if your sand bed is not functioning
properly, nitrates will build and may not show in test kits because the
nitrates are bound in the cyanobacteria.
What is your salinity at? 1.026-1.027?
Some good water changes, and as Mark said, siphon the cyano out when you do the
water change.
Also as mark said, check your lamps.
Also more current..;. keep alk up and pH high via Kalk additions...
increase/improve protein skimming... I wouldn't worry about phosphate too
much... Read below
""Cyanobacteria have specific chemotypes that can be used to measure bloom
biodiversity. They are poor indicators of nutrient enrichment _ _and have no
relationship with phosphate,_ _ a negative relationship with Nitrogen/Nitrate,
a strong negative relationship with salinity, no relationship with other algae
growth (slightly negative with certain macroalgae (which I asked if it may be
due to secondary metanbolites acting as antibiotics, to which I discovered that
was the next course of study), a positive relationship with temperature and a
strong negative relationship with water motion. They tend to occur in 3 week
cyclical periods and are grazed, by far, primarily by amphipods and sea
hares.""
This is a copy and past from a post that was made by Eric Borneman after
attending the NCRI conference
Rod Buehler
www.asplashoflife.com