LancsRick
Member
- Joined
- 18 Apr 2012
- Messages
- 683
I hooked up my two Eheim 2217s last night (and initiated myself into the external filter camp of "mouth of fish water"), and I'm hugely pleased with them. Given that I have a 190l tank (Trigon), I was expecting to need both of them in accordance with the 10x flow rule.
With a single filter running (intake at rear apex, horizontal spraybar on front glass facing rearwards), there appears to be flow around the entire tank (I kicked up a load of mulm deliberately to get a visual representation of the flow). This is only 5x my tank volume though, so I then kicked in the second filter, with the intake at the same place, and the output as a horizontal spraybar on one of the straight sides of the tank, cutting across the flow of the first spraybar at 90degrees. Unfortunately this turns my tank into something resembling an underwater gale, and it really doesn't look beneficial for either plants or fish!
So, the question is this: What is the best way to preserve flow throughput, whilst not setting up a whirlpool in the tank? Physically I can't see how this is possible, but there are smater people than me here!
Alternatively, is the single filter enough if I appear to be getting steady flow around the tank?
Cheers!
With a single filter running (intake at rear apex, horizontal spraybar on front glass facing rearwards), there appears to be flow around the entire tank (I kicked up a load of mulm deliberately to get a visual representation of the flow). This is only 5x my tank volume though, so I then kicked in the second filter, with the intake at the same place, and the output as a horizontal spraybar on one of the straight sides of the tank, cutting across the flow of the first spraybar at 90degrees. Unfortunately this turns my tank into something resembling an underwater gale, and it really doesn't look beneficial for either plants or fish!
So, the question is this: What is the best way to preserve flow throughput, whilst not setting up a whirlpool in the tank? Physically I can't see how this is possible, but there are smater people than me here!
Alternatively, is the single filter enough if I appear to be getting steady flow around the tank?
Cheers!