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Discussion Starter · #1 · (Edited)
Hi Guys,

I have a 125L tank thats been cycled for about a month now with 3 well established Anubias plants on driftwood. However, when i transferred the plants from my old tank to the new tank about 6 weeks ago they quickly developed GSA.

Here are my tank parameters:
GH - 5 - 6 dh
KH - 2 dh
PH - 6.8 - 7
Phosphate - 1.5 ppm
CO2 - 0ppm
Ammonia - 0 ppm
Nitrate- 0.25 ppm
Nitrite - 0 ppm
Lighting - 2 x 14watt led tubes

I have tried everything possible to bring it under control but it continues to grow. I cut out the use of flourish ferts all together and started dosing excel daily, as required. I upped the phosphate to around 3ppm (along with magnesium and potassium dosing) and cut the lighting down to 4 hours a day for 3 weeks and still nothing, i even added nirite snails to the tank and they didn't even bother with it. In the past week i have kept a sheet over the aquarium to cut out all ambient light and Im still noticing GSA growth. My Anubias plants have also been growing very quickly since, so the treatment is working on the plants just not the GSA. Today I've resorted to taking out one of my pants and putting it in my 40Litre tank with very mature bacteria and Im hoping it will begin to subside. Im not sure what else i can do but any advice would be greatly appreciated!

Here is a link to some photos, they are not the best at showing the extent of the GSA but at least they offer an idea. Thanks!
https://www.dropbox.com/sh/xsmdyf6lslvl0lh/AAAVOSKMsUCsynwUXE7xt-gNa?dl=0
 

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Discussion Starter · #4 ·
Thanks for the welcome and quick reply! I think thats a good idea putting some extra plants around the anubias, ill be sure to give it a try. Next time I head to the aquarium specialist i might ask them about the lighting meter but they are 'juwel multilux' 80cm led tubes. Ive had BBA and GHA before and usually they clear up after a couple of weeks by double dosing excel but this GSA just wont quit. Even with a halved photoperiod it continues to spread. But I've had these plants for over a year in another tank setup and i never had a problem with algae on them, only when i moved them to the new tank did the algae take over.
 

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Discussion Starter · #10 ·
Just an update on the tank. After doing a butt tonne of research online I think i honed in on the reason why the GSA was so persistent. Im fairly sure it started because of low phosphate but hung around because of excess micro and macros in the tank. So yesterday i turned my pressurised C02 system back on to increase the uptake (I originally turned it off because the regulator is very touchy and i was worried about starting an algae bloom with the added phosphate and irregular C02) I then started spot treating my young anbias plants on the driftwood branch with pure excel. Since then I haven't noticed any new growth on the glass or new leaves which is good, however, the larger plants are still overrun with it. So today I just decided to a 2 minute bleach dip on one of the large anubias and bam! The GSA is gone! ill do the other plants later in the week depending on the state of the first plant and hopefully with the C02 running it will keep the GSA from spreading, fingers crossed! Thanks for all the suggestions though, Ive got shrimp in my tank too btw so ill steer clear of the 5x dose. but like i said, the spot treatment seems to be working. Heres a photo comparison of before and after the bleach, i wish i had taken a better 'before' photo to show just how much GSA was on the plant, but oh well.
https://www.dropbox.com/s/qj164iafhkzq8wa/Screen Shot 2018-10-06 at 9.18.24 PM.png?dl=0
 
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