“It's still a fairly big unit, but it's thin and tall, so you're more likely to save space under your cabinet. The elegant thing is that you can also use the Red Sea Check Valve, which snugly fits into the lid, meaning that the reservoir is protected from the air, dust and dirt. You also have a secondary angled cap, which means filling up is a little easier than other reservoirs. Quite pleased with the unit and the 18 litres means it keeps my 250L CO2-Injected High Light aquarium constantly with top-off water for well over a week.”
