Running a Skimmerless tank

[Coralgurl]

I've been running my 55gl tank skimmerless since March this year. I have a canister filter with GFO and carbon, plus fluval prefilters & foam pads which I clean every 2 weeks and change media every month. No sump.

I also have an MP10 and 2 Koralias for powerheads, running t5ho lights (2 bulb) and a vertex illuminix LED as supplemental lighting. There are currently 7 fish (2 clowns, 2 chromis, 1 flameback angel, midas blenny and flame hawkfish).

Have a mix of corals, mostly zoas, hammer, torch, frogspawn, brain and a large nem. mixed CUC, snails, hermits.

In the past few weeks I've had a really good cyano outbreak. I know I overfeed as my bristle worms are quite large. Corals are growing well and seem happy.

I have not tested my parameters in months, but obvioulsy have something going on. I did run a skimmer on the tank for almost a year, but it never really did much. Its a Tunze 9011 in tank, since I removed it, I love the additional space I have.

Is there a good way to continue to run this tank skimmerless or would throwing one on make that much of a difference, considering the cyano? There is no other pest algae in the tank otherwise.