Recurring Algae Issues in 6x2x2 - BBA & Diatoms - The Planted Tank Forum
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post #1 of 2 (permalink) Old 05-29-2019, 02:22 PM Thread Starter
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Recurring Algae Issues in 6x2x2 - BBA & Diatoms

TLDR: Can’t stop BBA & diatoms from returning, have stopped responding to treatment. Help!!!

Hi all,
I need some help regarding some recurring algal issues in my 6x2x2. The tank is about 14 months old (yes in months, it’s a baby).
I have had a continuous battle with BBA and a bit of diatoms sneaking about. BBA is primarily on my driftwood, with a little bit on rocks here and there as well as on the background. I’ve also got diatoms growing wherever it fancies - On the glass, rocks, old plant growth etc.
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4ft sump system, pressurised Co2 + pH controller. 2800lph pump, think I need to upgrade.
5h Photoperiod 100w COB (pretend its a kessil at full power)
I have just started redosing EI after starving the tank for a while - screwed my previous doses and ended up with a tank full of GSA + GDA. Growth is returning.
Unfortunately the tank is only partially lit but I can’t really help that as I can’t afford a second light currently

I really need some help as I’m not sure what to do - I scrape it off it grows back. I crank Co2 my fish stop eating and it has no effect. I use 6% H2O2 to try kill the BBA and it has NO effect.
Have I created superstrain BBA?!!

TLDR: Can’t stop BBA & diatoms from returning, have stopped responding to treatment. Help!!!
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post #2 of 2 (permalink) Old 05-29-2019, 03:42 PM
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That's a tough one. With so little plant mass and so much hardscape driving any kind of significant light down is going to prove challenging. You also have big fish resulting in large waste that settles in the rocks, etc. That waste/food etc in the rocks becomes the perfect incubator for algae.

Co2 will only have a marginal effect in terms of algae control. The plant mass has to be there. Without it co2 will do nothing to curb algae. You need to run dim light and/or a very short light with regular cleaning of the rock area and large water changes. I would also use organic removal products like carbon, purigen as a good portion of your media.

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