The Senegalensis is getting better but long way to go. I did a full pH profile for my tank and tweaked the CO2 for a 1.0 drop on lights on and no change in pH (i.e. stable pH) during the first 4 hours of photoperiod. Eventually the pH drops by 0.1 more towards the end as I think the CO2 intake rate slows down after a few hours so CO2 level rises.wow looks very good! very little algae too. senegalensis issue seems to be resolved? what did you change mate, I need to know!
I find that having a Lily Pipe surface skimmer which is active 24/7 might be helping to stabilise the CO2 levels by allowing more CO2 to escape and thus prevent CO2 from reaching excessive levels. Of course, this means you have to pump more CO2 but I learnt in UKAPS that the ideal approach to CO2 is to treat it as if it was free.
I read that Rotala Wallichii responds quickly if conditions is not ideal so I guess its a good plant to watch to see if anything is going wrong. On one hand, I hope it turns pink, on the other hand, I don't want to go overboard with anything and kill it 🆖