Po4 and Cyano?

tmccaffery · 09/08/2020, 09:49 AM

I have a cyano issue and trying to figure out the cause. Could it be my light schedule and spectrum as well?

I have two checkers from Hanna

I have the Hanna HI 736 that reads 1 ppb converted to 0.003 ppm PO4

I have the Hanna HI 774 thats reads 0.03 did I do the conversion right, I know 0.003 not the same as 0.03.

What else should I check?

Vinny Kreyling · 09/08/2020, 05:37 PM

Flow is another concern for Cyano.
Are the areas in low flow areas?

bertoni · 09/08/2020, 05:51 PM

The light spectrum allegedly can be an issue, but that mostly holds for fluorescent and metal halide bulbs when they age. You might want to check the nitrate level, but unfortunately, chemical tests tend to be inconclusive when it comes to microbial problems. There are lots of species, and some of the pests seem to be adaptable to a range of conditions.

tmccaffery · 09/08/2020, 06:04 PM

Nitrate isn't showing anything, I am using Red Sea. Could low nutrients be the cause as well? Flow I don't think that is the problem. I am going to try and fix my lighting schedule and see if that fixes issue.

bertoni · 09/08/2020, 08:00 PM

Some people think that low nutrient levels can encourage cyanobacteria, but the issue is fuzzy. Are your corals (if any) doing well?

hegeh · 09/11/2020, 02:51 AM

Quote:

Originally Posted by tmccaffery

Nitrate isn't showing anything, I am using Red Sea. Could low nutrients be the cause as well? Flow I don't think that is the problem. I am going to try and fix my lighting schedule and see if that fixes issue.

Try bumping up thr nitrate to maybe 3ppm

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09/08/2020, 09:49 AM	#1
tmccaffery Registered Member Join Date: Apr 2011 Posts: 170	Po4 and Cyano? I have a cyano issue and trying to figure out the cause. Could it be my light schedule and spectrum as well? I have two checkers from Hanna I have the Hanna HI 736 that reads 1 ppb converted to 0.003 ppm PO4 I have the Hanna HI 774 thats reads 0.03 did I do the conversion right, I know 0.003 not the same as 0.03. What else should I check?

09/08/2020, 05:37 PM	#2
Vinny Kreyling Registered Member Join Date: Nov 2002 Location: Miller Place, NY Posts: 7,206	Flow is another concern for Cyano. Are the areas in low flow areas? __________________ 250 gallon mixed reef, 2 Reefbreeder's Photon V 2, Deepwater BLDC 12, DAS EX-3 Skimmer, MTC mini cal, 2-3/4" Sea Swirls, Aquacontroller & 6 Tunze pumps.

09/08/2020, 05:51 PM	#3
bertoni RC Mod Join Date: Mar 2002 Location: Mountain View, CA, USA Posts: 88,616	The light spectrum allegedly can be an issue, but that mostly holds for fluorescent and metal halide bulbs when they age. You might want to check the nitrate level, but unfortunately, chemical tests tend to be inconclusive when it comes to microbial problems. There are lots of species, and some of the pests seem to be adaptable to a range of conditions. __________________ Jonathan Bertoni

09/08/2020, 06:04 PM	#4
tmccaffery Registered Member Join Date: Apr 2011 Posts: 170	Nitrate isn't showing anything, I am using Red Sea. Could low nutrients be the cause as well? Flow I don't think that is the problem. I am going to try and fix my lighting schedule and see if that fixes issue. Last edited by tmccaffery; 09/08/2020 at 06:11 PM.

09/08/2020, 08:00 PM	#5
bertoni RC Mod Join Date: Mar 2002 Location: Mountain View, CA, USA Posts: 88,616	Some people think that low nutrient levels can encourage cyanobacteria, but the issue is fuzzy. Are your corals (if any) doing well? __________________ Jonathan Bertoni