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alphabeatsco 08-13-2012 12:35 AM

I've been running my tank for close to 9 months now.
everything is fine.
dosing ada fertilizers according to their instructions...

I change 50% water every week religiously. Is there any reason why I would start to grow diatoms close to end of week?

Once I scrub the tank and change water on Sunday, it'll be fine until around Thursday, then diatoms start to grow on the side of glass.

any suggestions???? i've tried to shorter the length of light & reduce fertilizers, still same.

Seattle_Aquarist 08-13-2012 12:54 AM

Hi alphabeatsco,

Otocinclus, they eat it like it is candy. I usually use one per 20 gallons and in a week or two the diatoms are gone. Otocinclus are also good at eating soft, flat, green algae types.

alphabeatsco 08-13-2012 01:09 AM

yes i have them in my other tanks, they are doing a great job.
but I also have a shrimp tank, which doesnot have them.

is there any way to prevent it ?

Seattle_Aquarist 08-13-2012 01:13 AM

Hi alphabeatsco,

Sorry, scrubbing and Otocinclus are the only two methods I am aware of.

alphabeatsco 08-13-2012 01:17 AM

thats what i've been doing.
but I am not sure what causes diatoms in the first place.

fplata 08-13-2012 01:22 AM

What filtration media do you use?

alphabeatsco 08-13-2012 01:26 AM

carbon filter

fplata 08-13-2012 01:32 AM

How old is your carbon? I know some folks will not agree with me here, but carbon seems to help me here

HD Blazingwolf 08-13-2012 01:50 AM

diatoms don't like intense light.

but an efficient bio filtration system usually prevents diatoms

okapizebra 08-13-2012 02:20 AM

Diatoms are usually in a tank until they have eaten all the excess silicates in the tank.

Complexity 08-13-2012 05:25 AM


Originally Posted by okapizebra (Post 1976779)
Diatoms are usually in a tank until they have eaten all the excess silicates in the tank.

Exactly. If you keep getting diatoms, then something is supplying that tank with silica.

Here's an interesting article about diatoms. It's written for saltwater tanks, but the basic concepts apply to freshwater.

alphabeatsco 08-13-2012 07:00 AM

what exactly is silicates?

Complexity 08-13-2012 07:14 AM


Originally Posted by alphabeatsco (Post 1976995)
what exactly is silicates?

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