Domination over everything but Cyno!
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Old 04-30-2015, 04:26 AM   #1
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Domination over everything but Cyno!

Loooooooong overdue register'er here. 1st time poster, long time reader.

75 Gallon
Temp: 80.0
Lighting: 2 6500k running 8 hours (other 2 bulbs currently turned off)
Powerhead: 750gph
Filter: Fluval 406 / 306 *** time to replace media maybe?? ***

CSM+B 1/4 tsp (3x alternating)
KNO3 - 2/4 tsp - dropping this as a test and NO3 seems to stay around 10
KH2PO4 - 1/8 tsp
K2SO4 - 1/4 tsp
Chelated Iron - 1/8th (3x alternating)

My bubble count is high, but drop checker shows light green

Current Params:
PH: 6.5-7
PO4 - 0.5 - 1.0
NO3 - 10ppm
KH - 8
GH - 4

Weekly water changes with RO/DI water re-mineralized with Equilibrium and PH buffers.

Anyone have any advise? It mainly grows around the front, along the sad attempt at DHG, and stops at the "tree line". This SHOULD indicate too much light(?) but I have no way to currently raise the lights. They are enclosed in the canopy.

It's not an eye sore but its not a Tom Barr looking tank.... Any advise would be great!
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Old 04-30-2015, 04:31 AM   #2
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Try adding 10ppm Mg via Epsom salt, and add ottocinclus if you don't have them already.

Spot treatment with H2O2 may help as well.
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Old 04-30-2015, 12:35 PM   #3
Dr Fishbait
Algae Grower
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I have the same set up as yours and I didn't win the cyno battle untill I cleaned up all the organics in my 2+ year old set up. ( ie, cleaning the filters more often and vaccuming the substrate weekly at water change). The smell of cyno is the only time my wife complains about my tanks!
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Old 04-30-2015, 02:52 PM   #4
Algae Grower
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I had the early signs of cyano show up in a very young tank that hadn't found its balance, and treated with API erythromycin as per the instructions. Immediate and complete success with a 5 day course.
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