- Joined
- Apr 1, 2019
- Messages
- 298
- Reaction score
- 271
Hello,
Hoping somebody can help me with my cyano problem, I’m at my wits end with this stuff! I’ve spent countless hours reading thread after thread of suggestions, but I still can’t get rid of the stuff. Most of my sand bed and large portions of rocks are continuously covered with nice red mats. I’ve long since given up on manual removal. I use to spend a few hours every week removing every single visible piece of cyano, yet a week later the sand bed and rocks would be covered in cyano. Here’s some system parameters:
75gallon tank, 25g sump.
T5 lighting with reefbrite supplement
700gph return pump, 2x gyre 350
Reef Octopus skimmer INT250
Alk ~8.5
PO4 (Hanna ULR ~0.02-0.03ppm)
NO3 (Hanna high range 0 ppm)
Tank age ~1.5 years.
Corals look great and I’ve had amazing growth over the last year- tank just looks awful because of all of the cyano growth.
I dose two part and saturated kalk to my evaporation limit. I skim pretty heavy, and can’t skim anymore or I will bleach my corals, 0.02ppm PO4 is about as low as I’m comfortable going. Nitrates undetectable. I feed pellets in the morning and a small chunk of frozen in the evenings. Ph ranges daily between 8.2 and 8.6. My flow is as high as it can go without blowing around the sand bed or hitting the corals too hard.
I’ve tried stirring my sandbed (1-2.5” deep, varies) in multiple places multiple times a week, but that didn’t make a large difference.
Any suggestion on what to do here? The classic solutions are to no avail- can’t increase flow any more (would be sandstorm), can’t reduce nutrients anymore (SPS would bleach), and manual removal just results in cyano covering the tank again a week later.
Any suggestions would be much appreciated- I’m at my wits end here!
Hoping somebody can help me with my cyano problem, I’m at my wits end with this stuff! I’ve spent countless hours reading thread after thread of suggestions, but I still can’t get rid of the stuff. Most of my sand bed and large portions of rocks are continuously covered with nice red mats. I’ve long since given up on manual removal. I use to spend a few hours every week removing every single visible piece of cyano, yet a week later the sand bed and rocks would be covered in cyano. Here’s some system parameters:
75gallon tank, 25g sump.
T5 lighting with reefbrite supplement
700gph return pump, 2x gyre 350
Reef Octopus skimmer INT250
Alk ~8.5
PO4 (Hanna ULR ~0.02-0.03ppm)
NO3 (Hanna high range 0 ppm)
Tank age ~1.5 years.
Corals look great and I’ve had amazing growth over the last year- tank just looks awful because of all of the cyano growth.
I dose two part and saturated kalk to my evaporation limit. I skim pretty heavy, and can’t skim anymore or I will bleach my corals, 0.02ppm PO4 is about as low as I’m comfortable going. Nitrates undetectable. I feed pellets in the morning and a small chunk of frozen in the evenings. Ph ranges daily between 8.2 and 8.6. My flow is as high as it can go without blowing around the sand bed or hitting the corals too hard.
I’ve tried stirring my sandbed (1-2.5” deep, varies) in multiple places multiple times a week, but that didn’t make a large difference.
Any suggestion on what to do here? The classic solutions are to no avail- can’t increase flow any more (would be sandstorm), can’t reduce nutrients anymore (SPS would bleach), and manual removal just results in cyano covering the tank again a week later.
Any suggestions would be much appreciated- I’m at my wits end here!