Deluxe CPR Continuous Siphon Overflows

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Quick Overview

A built-in overflow is the most efficient method of draining aquarium water to a filter. If your aquarium does not have built-in overflow, CPR Continuous Siphon Overflows/Prefilters are the best means for getting water from an aquarium to a filter system. They quietly skim up to six times more water than units with tubes.


The advantages of CPR Continuous Siphon Overflows/Prefilters include:


  • Adjustable water level allows you to easily change the level in your tank

  • Black top reduces algae growth

  • Plastic screen to prevent fish loss

  • Quiet operation: All units except the CS150 come with slip screen, sponge and vent tube to help reduce noise.

All Units come with the Aqualifter Pump and acrylic lid for quieter operation.


How to Choose an Overflow -CLICK HERE

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  • Quick Overview

A built-in overflow is the most efficient method of draining aquarium water to a filter. If your aquarium does not have built-in overflow, CPR Continuous Siphon Overflows/Prefilters are the best means for getting water from an aquarium to a filter system. They quietly skim up to six times more water than units with tubes.

The advantages of CPR Continuous Siphon Overflows/Prefilters include:

  • Adjustable water level allows you to easily change the level in your tank
  • Black top reduces algae growth
  • Plastic screen to prevent fish loss
  • Quiet operation: All units except the CS150 come with slip screen, sponge and vent tube to help reduce noise.

All Units come with the Aqualifter Pump and acrylic lid for quieter operation.

How to Choose an Overflow -CLICK HERE More

Deluxe CPR Continuous Siphon Overflows

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Deluxe CS50 with Lid and Aqua Lifter
SKU: 206560
Earn 109 Reward Points
$109.99
 
 
Deluxe CS90 with Lid and Aqua Lifter
SKU: 206561
Earn 119 Reward Points
$119.99
 
 
Deluxe CS100 with Lid and Aqua Lifter
SKU: 206562
Earn 129 Reward Points
$129.99
 
 
Deluxe CS102 with Lid and Aqua Lifter
SKU: 206563
Earn 139 Reward Points
$139.99
 
 
Deluxe CS150 with Lid and Aqua Lifter
SKU: 206564
Earn 149 Reward Points
$149.99
 

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Product Questions

Can I somehow restrict the flow on the CS50 to 250gph?
Question by: Owen on Dec 2, 2013 12:23:00 PM
Hi Owen,
You wouldn't want to restrict the flow on the overflow itself otherwise you run the risk of an overflow if something impedes it further (snail, algae, etc) but you can restrict the output of your return pump to 250gph. If 250gph is all that is pumping up the tank, then 250gph is all that will drain via the overflow. Its basically self replicating (up to the max size of the overflow) because it only drains the water that "overflows" into the overflow system.
Answer by: Bulk Reef Supply on Dec 2, 2013 12:23:00 PM
how big should this box be for 125 gal tank
Question by: john on Apr 20, 2014 7:30:00 AM
Hi John,
The overlow box just has to be large enough to accomidate the flow from your return pump. Without knowing how big your pump is I can't say for sure, but assuming its in the ballpark of 1200gph like most return pumps on a tank that size would be, the CS102 should do the job.
Answer by: Bulk Reef Supply on Apr 20, 2014 7:30:00 AM
Perhaps a silly question but, now that I have my sump with CPR overflow up and running, how do I keep my floating fish food pellets(Spectrum) from being sucked into th overflow?
Thanks, Shane
Question by: Shane on Mar 10, 2014 8:10:00 AM
Hi Shane,
Its a good question and one that everyone with a sump faces. The most common solution is to turn off the return pump while you feed. Almost every controller on the market has a standby or feed option which allows you to turn them off on a temporary timer so if you have a controller that is the best route to go. Otherwise just pull the plug (just don't forget to plug it back in!).
Answer by: Bulk Reef Supply on Mar 10, 2014 8:10:00 AM
Does the Aqua-lifter pump run continuously or does it have some a sensor to know when air is in the system?
Question by: Brian on Jul 21, 2014 12:38:00 PM
Hi Brian,
The aqualifter runs continuously. Really there is no reason not too. There isn't a downside to running it and the last thing you want is for it to not run because of a malfunction from an extra sensor :)
Answer by: Bulk Reef Supply on Jul 21, 2014 12:38:00 PM
What size (or type) return pump would you recommend with this overflow? It would basically need to have about a 5' head height to reach from sump to tank. Thank you!
Question by: andrew on Dec 16, 2013 9:51:00 AM
Hey Andrew,
It depends on which of the overflows you are looking at. As a rule of thumb though you want your return pump to be in the ballpark of 10x the size of your tank. So around 500gph for a 50g tank for example. Then make sure that your overflow is rated for a flow higher then whatever that number is. You don't want a 300gph overflow with a 500gph pump as that extra 200gph has to go somewhere (and it will be on your floor!).
Answer by: Bulk Reef Supply on Dec 16, 2013 9:51:00 AM
In the event of a power failure when I'm not home, will the unit begin the siphon automatically when the power comes back on? Will there be any chance of overflowing my tank or system?
Question by: Debbie on Apr 30, 2014 5:46:00 AM
Hi Debbie,
The overflow is designed as such that the siphon is maintained in the event of a power outage. It won't "recreate" a siphon but it shouldn't lose a siphon to begin with.
Answer by: Bulk Reef Supply on Apr 30, 2014 5:46:00 AM

Full Details

DELUXE PACKAGE Includes:

  • CS Siphon Overflow box
  • Acrylic Lid
  • Aqua-Lifter Pump

CS50 Specifications:

  • Flow Rate: 300gph
  • Outflow Size: 3/4" Bulkhead
  • Width: 6"
  • Requires approximately 6" of clearance on outside of tank

CS90 Specifications:

  • Flow Rate: 600gph
  • Outflow Size: 1" Bulkhead
  • Width: 7.25"

CS100 Specifications:

  • Flow Rate: 800gph
  • Outflow Size: 1" Bulkhead
  • Width: 9 3/8"

CS102 Specifications:

  • Flow Rate: 1,200gph
  • Outflow Size: 2 x 1" Bulkheads
  • Width: 9 3/8"

CS150 Specifications:

  • Flow Rate: 1,600gph
  • Outflow Size: 1.5" Bulkhead
  • Width: 9 3/8"

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Reviews

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  • Great product but beware of over flowing syphon By GP on 7/28/2015

    Do not get it with out the pump or you are increasing chances of syphon failure. Even with pump it may happen so invest in a new tank or get an apex controller with relay floats to control return pump in case of over flow.
  • Great Product By Luke on 7/11/2015

    Straight out of the box, it was quick and simple to install on the tank. I did not want to drill my tank and this fit the bill perfectly. I did do a little oversized on it to get better flow rates and additional protection, and this overflow delivers!
  • Overflow By Ty on 3/6/2015

    I was abit uneasy about hooking up a overflow to my 60gal (never worked with pvc before) But it was a breeze, and the CS90 has worked like a champ. Not loud at all and skims water great. Thanks to BRS for the great product!!
  • no Better service, no better product. Thanks BRS!!! By Trinnium on 2/26/2015

    If you need an over flow box, this is the one to get. If you’re not sure where or whom to perches it from, then someone has failed to direct you to BRS!!!. Amazing product!! Amazing service!!, that sums it all up. O yea!! I am real person like you, not someone that works for them or computer generated:). Just saying :).
  • Does its job By Sean on 2/16/2015

    It works like it is supposed to and its the only option I have now. But it is a little big and requires a lot of room behind the aquarium.
  • good product By Ken on 1/26/2015

    If you are not able to get a pre-drilled tank these are great products. You can regulate the flow from the return pump and make it virtually silent. It can be difficult to clean but I have only had to do that on a few occasions. This is my second CPR overflow, the first was 10 years old and I had no problems with it, I damaged it moving my 75 to another room so this is a replacement. The aqualifter, I can take it or leave it. I was using a MaxiJet 1200 with the same results plus the added benefit of additional current.
  • lifter pump runtime By Greg on 12/22/2014

    If you are worried about the lifter pump failing after it has run so long it dies (I read this concern), what you can do is put a refractometer in line with the tubing. You could probably use a Smart ATO, and if it senses a refraction due to salt water it will be off, If the refractive index is that of air, it will turn on. Much like it behaves in a sump turning on an auto fill cycle. Seems like a lot of trouble though. The lifter pump is a safe guard against air pocket build up in your overflow and is not necessary for the overflow to run. It is a safe guard and certainly recommended. Much better than U-tubes.
  • CS90; The perfect HOB overflow By Greg on 12/21/2014

    Installed a CS90 w/lifter pump. Plugged it in. Done. Perfect. I too got a little gurgling at first however, then increased my flow to hold at about an inch above the head of the filter guard on the intake. Silent.
  • Excellent By Roger on 11/20/2014

    I've had this overflow for almost a year now. It works flawlessly. Easy to assemble and use.
  • Great Product By Bill on 9/7/2014

    I have been useing this over flow for about 8 years. I just replaced it because the nipple for the vaccume pump broke off. I have never had a siphon break in all those years. When the power goes off, it starts up quickly and resumes the flow. If you do not have a drilled tank, get this product
  • quality product By Eric on 7/26/2014

    Purchased this because I cannot drill holes in my tank. I was nervous when buying this because of it possibly failing, but it has been running constantly with no issues. When power goes out it drains into sump and when power comes back on the siphon restarts and works just like it should.
  • Good By Victor on 3/11/2014

    I have the CPR102 on my 75 gallon with 40gal sump. I like how quiet it is, it does need a little tweaking to get it quiet My Skimmer is louder than this

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