is the fan spinning? try to air blow/clean the fan and make sure it spins. if it spins and has the issue, its a hardware problem and you would have to contact ecotech do a warranty exchange.
whats in the media bag that's zip-tied? you put carbon in it? are you able to put it somewhere for more waterflow as in a sump / canister / hob?
also: based on your pictures, where is your flow? i don't see any powerheads.
i've beem using reefing art plugs but wondered off with oceans wonders since i could not cut off the stem without a bandsaw. i still use their tiles though.
https://reefingart.com/collections/frontpage/products/reefing-art-ceramic-coral-frag-tiles-30pcs-free-coral-glue-for-sps-lps-softy-frag-plugs
nothing. i run high par with high nutrients. i dont grow any chaeto. just a large skimmer and a ton of media blocks.
ask @Srt4eric how many blocks he counted last time.
i started doing 10% water changes for the first year when I started. I stopped doing water changes ever since and its been at least 4 years+ since my last water change. I run a carx and dose red sea trace abcd with quarterly ati icp testings.
take in consideration for what alk level you want to be at. that salt runs at 12 alk. if you are planning sps, its best to get the blue version since it mixes at 7. i run 7.5 - 8 for my sps dominated tank.