Constant algae issues

[Rpc07]

To start the tank is 1.5 years old, it’s a Reefer 250 (50ish gallons of water volume)

Lighting - Reefbreeder photon v2+ 8 hours max intensity 2 hour ramp up/down. Running about 325 par 8” bellow the water surface

Flow - dual RFG’s on the return line plus dual AI Nero 5 pumps on Random mode 30% - 60%. It creates a nice random flow action in the tank.

Dosing - BRS pharma 2 part and Tropic Marin part c dosed equally. 1ml of acropower daily.

Feeding - auto feeder 2x daily W/ Neptune pellets & 2 cubes/chunk frozen every night.

Refugium lit 12 on/off
Deltec ix600 skimmer
Small amount of carbon monthly
No GFO
Phosphate E for p04 control
10 gallon water changes bi-weekly W/ tropic Marin pro salt

My last parameters as of 2 days ago are :
Alk - 8.8 Salifert
Cal - 490 Salifert
Mag - 1500 Salifert
P04 - .1 Elos high res kit
N03 - 4ppm Salifert & Nyos
Sg 1.025 - Hanna
PH - 8.3 Hanna

These have been my parameters and routine with small ups and downs for easily the last 9-10 months.

On to the issue for the last year I have been getting brown what looks like diatom algae on the sand and this dark green algae that acts exactly like Cyano ( small patches that blow off easy) I can’t for the life of me figure out what’s going on. I see all these tanks with gorgeous white sand and I envy them all.

Here are some pics

 

[Hermie]

algae doesn't look that bad IMO, but what kind of light do you have on your refugium? You have a lot of PAR (IMHO) in the display, which the fuge light has to "battle" against.

 

[JPergamo]

Following. Is that green brown algea sort of "dusty" if you will? it's not like normal diatoms in my tank either i have no clue. I have a few patches that look identical. For a long time it grows and wanes and I have no idea what it is. My parameters are pretty much identical. Current system is 3 years old.

 

[Rpc07]

algae doesn't look that bad IMO, but what kind of light do you have on your refugium? You have a lot of PAR (IMHO) in the display, which the fuge light has to "battle" against.

It’s possible but my chaeto grows like weeds and I even have some turf algae I remove every week or so.

Following. Is that green brown algea sort of "dusty" if you will? it's not like normal diatoms in my tank either i have no clue. I have a few patches that look identical. For a long time it grows and wanes and I have no idea what it is. My parameters are pretty much identical. Current system is 3 years old.

The brown algae on the sand seems to act like diatoms and the green algae acts exactly like Cyano I can take a pipette and blow it right off.

 

[ZoWhat]

You may want to look into recharging your system with good bacteria then vodka dose after that.

Dr Tim's Waste Away is good but NOT a stand alone solution.......as his product reintroduces good bacteria but you got to cultivate what's been reintroduced with some form of carbon dosing like 80proof vodka

Hth