Why Is My Alternanthera Reineckii 'mini' Going Green?

[levahe]

The pH drop is gradual so won't affect the livestock, its more very rapid pH changes I believe its best to avoid.
When adjusting the co2, do it very slowly as adding too much can kill fish and shrimp. If you see the fish looking like they breathing fast and gasping at the surface its time to reduce the co2 a bit.

 

[PsychoATCO]

Thanks levahe!
 
As I have mentioned, I have adjusted the lighting. I hacked back the plants that had been overcome by algae, and removed all the green-hair-stranded-algae from the tank. There is only a little surface algae on the side of the filter.
 
I spent the entire of yesterday going from LFS to LFS and cannot find a CO2 drop tester. All they stock is a "long-term-stick-inside-the-tank-and-forget-about-it" CO2 level tester... I have one on order from amazon but hasn't arrived yet, so didn't really wanna buy another. Here in Germany the testing kits are either Tetra (going out, not many stockists), JBL, and Dennerle. Nothing from API, Hach, etc. Will keep searching...
 
Thanks
Bryan

 

[levahe]

You can use any liquid pH tester to monitor your co2 levels like I described before, I use the api liquid pH test and also have a drop checker in the tank too

 

[PsychoATCO]

You can use any liquid pH tester to monitor your co2 levels like I described before, I use the api liquid pH test and also have a drop checker in the tank too

 
Right you are! Sorry for the senior moment. With my regime as I had it - the pH stayed static at 7.1 during the day. I shall leave some water to stand overnight and then check and see what happens prior to lights on time.
 
It seems that some of the Eleocharis sp. "mini" has rotted. I opted to remove it - was stinking badly. Nothing else looks dubious at this stage...

 

[PsychoATCO]

So anyway they started decaying. I ripped them all out. The green grassy stuff had rotted too. So I don't know. There is plenty circulation and all the water parameters seem ok. The liquid ferts didn't help.

 

[levahe]

If the plants are dying or melting, that can only mean that there is not enough co2/fertilisers/flow. Either one or all or a combination of those things is the problem for sure.

Did you get a drop checker or test the co2 with a pH test?