I’m probably going to keep up with it, just to see how it goes. I may try adding some copepods too. I’ve never really had any that can be seen in this tank. I added the 5220 from AlgaeBarn twice but they definitely did not establish and take off. Should probably look into different sources. I’ll check out Eldridge.I started dosing phyto about five months ago and dose it (almost) every day. I started with 1ml/gallon of the phyto from @Eldredge. I now dose 2ml-2.5ml/gallon. I don't know that I can say I see a difference but the tank just 'feels' more dialed in. I've had cyano 'challenges' (opportunities?) for six months now. I don't actively fight it other than blowing it off the rocks when it encroaches on a coral or maybe grab a mat or two during a water change. I started the phyto mainly to compete with the cyano and the GHA (mainly gone now except for a small patch I just keep trimmed. While it did not eliminate either 'pest' I feel it has prevented them from taking over and everything just looks a little happier. It could just be me trying to rationalize the expense but I'm going to keep doing it.
I also dose some copepods from @Eldredge occasionally, some Reef Nutrition Tigger Pods about once a quarter and Reef Stew (a locally produced phyto/copepod/brine shrimp mix) every month or two. It makes me feel good. I know my Nassarius snails and micro brittle stars seem to appreciate it.