Must one worry about these algae

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Kuilsriver, Western Cape
Hi guys

I've noticed that during the past 2 weeks I've got a algae bloom in my tank. Must I worry about these algae in the pictures?

I do a 10% WC every second week, so +- 20L. I dose Special Blend once a week. I add Aquavitro Fuel and Reef Zoo Plankton once a week and then Live Phytoplankton twice a week (All on different days). I think this might be the problem, because it is also "feeding" the algae. BUT I wanted to get my pod population up. I'm thinking of cutting down to only 3 (1 of each product) per week.

All my parameter were fine except the temperature, but with the 4 fans running it comes down to 25 in the evening and cooler day.
NH4 = 0
NO3 = 9
Ca = 480
Alk = 8
Mg = 1500-1550
Salinity = 1.025-1.026
pH = 8.4
Temp = between 25 - 28

I've got a few snails, sand sifting starfish, Blenny and a Regal Tang that eat some of the algae.

What else can I do? Or is there no need to worry?

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I think you are right that you are adding too much coral food. Maybe even cut back to fuel once a week with special blend.

If you want to you can maybe add another product in between but imo that would be too much.
 
Would like to know your PO4 levels. For a start, you can cut your light cycle or even run a 3 day black out...
Currently I'm running my blue lights for 12 hrs, and white light for 10 hrs. Thinking of cutting it to blue 10 hrs and white 8 hrs.

Will that be okay, and will the nennies still be happy?
 
Yes, the nennies will still be happy. Why do you want lots of pods? They are good but in a stable tank they will thrive even without all the food.
 
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Currently I'm running my blue lights for 12 hrs, and white light for 10 hrs. Thinking of cutting it to blue 10 hrs and white 8 hrs. Will that be okay, and will the nennies still be happy?

For a start you can run a black out for 3 day period and cut your light cycle to 6h per day. When last did you change the bulbs on your light unit? What type of light do you use? T5 Led?
 
There are a lot of air bubbles,
Which leads me to believe you may have to little flow?

Do you have flow dead spots? detritus will settle and cyano algae will grow.
 
Just another thing...
Sand sifting starfish need very, very big, established systems.
They will slowly starve to death in a smaller tank. It will die under the sand and you won't know. It will then cause an ammonia spike.
 
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Just another thing...
Sand sifting starfish need very big, established systems.
They will slowly starve to death in a smaller tank. It will die under the sand and you won't know. It will then cause an ammonia spike.

I will keep my eye on the starfish, the system is over 3 years old, I bought it over from someone.

Only other major thing I did was 2 weeks ago was moving and aquascaping my LR. But I did do a WC afterwards, and tested all my parameters. Everything tested fine.
 
Mostly overfeeding and insufficient filtration

Also, not enough water flow.
Old globes, if you got T5 or MH, when last did you replaced it?
 
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