Along these lines, I think you will need to figure out a way to keep water in the filter during an extended power outage, lest all the bacterial colonies die.Dr Joe;1127209; said:Keep the water level at least half way up the scrubbies.
Not just in the filter, but also circulating from the tank too.Finmore;1141207; said:Along these lines, I think you will need to figure out a way to keep water in the filter during an extended power outage, lest all the bacterial colonies die.
How big is 'big enough'? If you what cheap and can re-design a little you can use the flapper valve from a water closet in reverse.frasertheking;1141210; said:i use this same design on my pond but its an upflow instead and uses a water butt . only problem is if pump stops water drains out . but i cant find a one way valve big enough