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Siphon tube blockage issue
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Ron Reefman
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Joined: 03 Jan 2007
Location: Cape Coral, Florida, USA, Earth

PostPosted: 2007.01.03(Wed)18:38    Post subject: Siphon tube blockage issue Reply with quote

I've been keeping a 30 gallon reef tank for about 2 1/2 years with reasonable success (my soft corals are over growing the tank). And it only has a hang on filter, protein skimmer and chiller. So now I'm starting up a 75 gallon tank and using a wet/dry filter and an overflow tank. I have a 700gph pump for the water return and it seems to be just about right. I'm OK with a power failure and understand the issues due to the loss of the pump. But I haven't seen anybody address the issues of a problem with the overflow/supply side of the system. Lets just assume a snail gets caught in the overflow intake and clogs up the system, or my cat plays with the U-tube and breaks the syphon. Water supply to the filter is reduced to 90% by the snail, or zero by the cat. Now my new pump is running almost dry... that can't be good? How do I avoid this situation?
I'll jump off that bridge when I get to it!
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Joined: 16 Feb 2003
Location: PA, USA

PostPosted: 2007.01.03(Wed)19:17    Post subject: Reply with quote

can get an electric float switch that turns off the pump if the water in the sump gets too low. they sell them.
150 Gallon (567.811768 liters) community tank, 50 Gallon African Tank, 7 reef tanks, 6 FOLR, 28 freshwater tanks
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Joined: 04 Jul 2004

PostPosted: 2007.01.03(Wed)22:38    Post subject: Reply with quote

If you are on vacation for a few days, having zero flow through your system is not good. That's why esp. in larger displays I like to have redundancy; depending on your system design, in some cases two siphon tubes and two overflows are better than one... likewise two smaller pumps are better than one large pump... if one pump fails the flow and water level will be lower, but the second pump will often keep your system going until you can address the problem.
Keepin' marines happy for 25 years
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