Quick update and a good chance to talk about some basics if you choose to fiddle with nutrient dosing. Finally run in to the tanks first troubles but ultimately only feedback specific to this setup.
Plants colouring up nicely:
However, GSA on older green leaves and BGA:
The BGA runs along the glass just below the substrate with the eleocharis. It literally stops where the eleocharis stops along the tank sides.
For those that haven’t been following the thread I’ve been lean dosing just micros and potassium and awaiting the point where there’s signs the ADA Amazonia is running low on nitrate. I’ve also added a load of fast growing stems recently to speed up this process. The rapid colouration of the h’ra and newer stems anecdotally points to low nitrate. Up to now I’ve also omitted phosphate as much as possible (RO and a splash of tap) but feed the fish pretty decently.
From experience BGA is a good sign your NPK ratio is out of whack. The fact the BGA ends where the carpet ends says to me that soil has finally been stripped of nitrate by the carpet. This is also timed against the arrival of a lot of stem plants competing for resources very recently.
GSA on the older growth points to low phosphate. It also doesn’t matter a jot as you just replant the tops and address the phosphate issue.
At this point I would normally just add in root tabs to bump things up. But because of the presence of BGA that needs addressing by upping the nitrate in the water column.
I’m deliberately avoiding the temptation to put ‘ppm’ after any nutrients as a) hobby grade tests are rubbish and b) it’s an unnecessary level of detail to solve BGA and GSA.
Only thing I’ll be doing is dosing EI (full NPK and micros on alternate days) for two weeks as EI grants you the gift of not having to think too heavily as a starting point. Appropriate nutrition in the water column should address both issues. Will reassess in two weeks. Other than that just usual water change and the odd trimming and replanting of the stems.