any ideas?

[dan-iow]

cant seem to shift this, had light off, scrubbed it. got pearls and carbon in reactor running a UV light. used MICROBE-LIFT Substrate Cleaner, MICROBE-LIFT Special Blend & MICROBE-LIFT aqua balance nitrate remover

 

[Mike N]

Looks like cyano. What are you nitrate/phosphate numbers? How old is the tank?

 

[dan-iow]

tank about year old, here latest test

 

[Mike N]

Nothing too far out of line there. Is this cyano problem new? Made any changes to flow/lighting recently?

 

[dan-iow]

been about a month, no flow difference

 

[dan-iow]

got 2 jebao RW 20's and 2 tunze wavemakers

 

[Mike N]

got 2 jebao RW 20's and 2 tunze wavemakers

Have you made any changes to the amount of food you're feeding?
Cyano IME is almost always related to elevated nitrate/phosphate (or flow), but the readings can be confusing.
Maybe your nitrate/phos levels are higher, but the cyano is using it up.

 

[dan-iow]

I only have one clown fish and boxer shrimp in the tank plus clean up crew

 

[dan-iow]

so don't feed much

 

[Mike N]

Im very puzzled then.
You've made no changes to feeding/lighting/flow. The only other thing I can think of is high TDS source water.
Do you use RODI water at zero TDS?

 

[dan-iow]

yeah got to be that, but issue is its shop bought, so will maybe have to change supplier. issue is I'm on the isle of Wight so not many to choose from

 

[Mike N]

yeah got to be that, but issue is its shop bought, so will maybe have to change supplier. issue is I'm on the isle of Wight so not many to choose from

Are you able to buy a RODI system and make your own water?
It seemed like my tanks went on cruise control when I starting using 0 TDS water. Much easier to manage.

 

[dan-iow]

I have one, its the waste water that I have issue with, what do people use it for