That's a lot of algae
😱 (possibly the reason your tank looks "darker")
Filter: Eheim eXperience 250T with Eheim Substrat Pro and 3 foam pads
You might start with a thorough filter "clean" - check your tubing & filter pads, rinse any debris from media using conditioned tap water (maybe consider adding in a fine filter pad - not sure what your foam pads are like, but mine are quite coarse)
You don't mention a water change schedule (or I just missed it), but increase frequency while sorting algae issues
You might look at
fablau's photos in post # 343, then scroll back to understand what he changed in his tank (I think lean dosing combined with purigen & carbon to reduce DOC's etc in the tank) - there are many theories about what encourages/discourages various algaes ... mostly it seems to be about finding the balance for
your tank (nowhere near as helpful as a point by point program )
You
seem to have good flow, good CO2 etc but you also have loads of algae, so something needs to change.
If you've a spray bar, you might consider going back to that for awhile - definitely test flow patterns in your tank, as the plants have grown in these will change, also your rocks do impose a significant barrier effect
Try (gently) combing through your moss to see what you can remove manually, also note whether there is significant amounts of trapped debris - give your mosses syphon attention during every water change - though you may need to warn resident shrimp first
😉
Once you've done a "clean up", you might do a 3day blackout (do some searches on ukaps for various examples) - this should affect algae more than plants, & you should be able to remove a good bit of debris afterwards. (again give tank & filters a good clean - you can skip the pre-blackout clean if you like & just do it at this stage)
At this point, decide how aggressively you want to trim/remove algae damaged leafs - basically wherever you see algae, there tends to be some degree of leaf damage ... as plants grow, gradually remove these older leafs.
If you can "borrow" some juvenile SAE from your local fish shop, these are great algae cleaners (they just get too large for a 60P, especially as they are quite social fish that are best kept in groups) - note they will be a test of your mad fish capture skillz at removal time
😀
Adding in extra shrimp should also help, tiger shrimp are excellent algae crew (& don't get as large as Amano's),
red nose shrimp (there seem to be number of species sold under this general term) etc but first note your fish reactions, shrimp may be limiting their algae grazing due to fish interest
If you decide to increase CO2, do it while you're at home to monitor fish.
Adding "improved" aeration (oxygen) at night can also help limit algae - again you may already be doing this - just raise the lily slightly for greater surface agitation
Reduce light period - try 5-6 hours rather than the current 8, once algae is sorted you can likely slowly increase this time period again
Daily dosing of liquid carbon may also help reduce/discourage algae