42% of 12 verified Hydor Koralia Evolutionowners don't recommend it — based on real owner comments from Reddit, enthusiast forums, and YouTube.
For balance: 58% recommend it. This page collects the complaints so you know what you're signing up for — read the full owner report for both sides. How we score
“Ive had 3 of these pumps and they have all either failed to restart after being turned off or go into reverse sucking in soft carals !.if youhave a short power cut they cant be trusted to come back on again which isnt good if your not about”— @tonymarshall509 on YouTube
“Well within a year all four were in the trash. For me these were a design disaster right from day one.”— redfishbluefish on Reef2Reef
“I hated the evolution series. Poor grill design caused them to spin backwards on a wavemaker.”— Tab28 on Reef2Reef
“Stay away from hydro I had three different 75o’s leak voltage and zap me”— Bdliquidchef on Reddit
“Hydor pump need to catch up with tunze and vortech product.”— @haivang1 on YouTube
“The older one seems to have twice the power of the new”— Seraphis79 on Reddit
“I to got tired of them running backwards”— chaoha on Reef2Reef
Not complaints — practical notes from owners that didn't affect the score.