Diatoms continue - 10 months on - The Planted Tank Forum
 
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post #1 of 3 (permalink) Old 02-03-2020, 06:42 PM Thread Starter
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Diatoms continue - 10 months on

I've been on here in November 2019 on this subject and I'm now back as little has changed.
200 litre been set up 10 months now.
Used a fully cycled filter from my bigger tank.
Had Diatoms from day one.
I use Phosnet & Phosguard and the Silicate test kit shows zero Silicate in the tank water.
It's very high at the tap. So this means the Phosnet is working.
However I still have a large amount of Diatoms on most surfaces. I wipe it off out of the tank as much as possible, but on the glass and back wall some must get passed around before I have chance to wash the sponge out of the tank.
Is this ever going to go away ? as I'm really starting to lose heart with this tank.
Currently doing 50 litre ( 25 % ) water changes twice weekly.
I've been getting some green algae. I was told the green algae would out compete the Diatoms and would make it disappear? This hasn't happened. There's still TEN times as much Diatoms as green algae.
All parameters are fine.
Thanks in advance. Someone save me from going mental !!!
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post #2 of 3 (permalink) Old 02-03-2020, 06:55 PM
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Diatoms are usually related to an immature bio-filter. That's why you see it mostly with newer tanks. When you do water changes are you careful not to harm/kill the bio?

Also be careful using PO4 removers. That's not the cause and plants need it. If you remove it all it will cause plant issues, not the least of which is green spot algae


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post #3 of 3 (permalink) Old 02-03-2020, 08:47 PM Thread Starter
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Quote:
Originally Posted by burr740 View Post
Diatoms are usually related to an immature bio-filter. That's why you see it mostly with newer tanks. When you do water changes are you careful not to harm/kill the bio?

Also be careful using PO4 removers. That's not the cause and plants need it. If you remove it all it will cause plant issues, not the least of which is green spot algae
Yes, I'm only rinsing the top fine filter wool every 2 to 3 weeks in tank water, as it goes very brown as it collects debris. I've only emptied the water out from the bio twice in 10 months as it was going quite thick with deposits on. I only tipped the dirty water out of It, and didn't rinse the media.
I understand what you're saying about the PO4 removers, but with Silicate so high at the tap, I have to address the Silicate issue there or I'll never get on top of It?
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