I don't have a controller for it, just one of these dimmers you can get as I'd didn't think i'd be sticking at it in my nano.. But actually I really do like the way the tank is tuning out.. Even though its been a pain in the butt.. I've recently added some Chilli Rasbora's and they give the tank some movement along with the shrimp.. May even look to rescape the 55l to full planted too!All sounds fine, just take things slowly and back off if any plants issues appear. LED lighting fixtures are a wonderfully easy way to melt all your plants and turn your tank into an algae farm..🙁