Help Cloudy water fix?

Bonkers

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Tank
What is the water volume of the tank? 240L
How long has the tank been running? Around 12 weeks
Does it have a filter? Yes, juwel M internal
Does it have a heater? Yes
What is the water temperature? 27 degrees C
What is the entire stocking of this tank? (Please list all fish and inverts.)
14 cherry barbs
11 Sterbai corys (5 of them were put in today)

Maintenance
How often do you change the water? Once a week or more as having algae problems.
How much of the water do you change? 50%
What do you use to treat your water? Tetra
Do you vacuum the substrate or just the water? Substrate.

*Parameters - Very Important
Did you cycle your tank before adding fish? Added 3 fish towards the end of cycle.
What do you use to test the water? API fresh
What are your parameters? We need to know the exact numbers, not just “fine” or “safe”.

Ammonia: 0
Nitrite: 0
Nitrate: 20
pH: 8.1

Feeding
How often do you feed your fish? Once a day
How much do you feed your fish? A couple of small pinches (gone in 2 mins)
What brand of food do you feed your fish? Aquarian flakes and fish science Cory tabs
Do you feed frozen or freeze-dried foods? No

hi guys
From what I have read this seems to be a bacterial bloom but have no experience to make that call. I change 50% of water and it’s crystal clear again but a day or 2 later I can’t see the back half of the tank.
I got the tank to look good in the front room and quite frankly it’s embarrassing as it looks like I don’t maintain it.

I have been advised to get a second (external) filter with a UV light by a friend at work so I’m here to try and back that theory up. Is this the only way the have crystal clear water in a freshwater tank?
 

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Bonkers

Bonkers

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DoubleDutch said:
Is it greenish or is that the picture ?
I thought it was milky/grey but my other half says she thinks it’s green so now I believe it’s microscopic algae floating around the tank and if that’s the case a UV light should hopefully do the trick? Is there anything else I can do while I wait for the new filter with a UV?
 
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Bonkers

Bonkers

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Fisch said:
Did the UV light fix it?
For me the UV light was a tank saver!!
Yes. Wow!

Here’s the results. I last used the magnet on the glass 3 days ago. Just a little bit at the bottom where I don’t like to get too close to the sand. Iv scratched the glass already with sand granules and the magnet.
 

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Fisch

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Bonkers said:
Yes. Wow!

Here’s the results. I last used the magnet on the glass 3 days ago. Just a little bit at the bottom where I don’t like to get too close to the sand. Iv scratched the glass already with sand granules and the magnet.
Beautiful, nice tank. Yes, I am definitely sold on the UV light.
 

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