Closed Loop System

[crashinc25]

180g FW tank
2 x overflow on back wall, 6" from corner
1 x 1" hole in each overflow (I built 1 1/4" Durso's, but did NOT do any gluing or drilling the top cap)
1 x 3/4" hole in each overflow (no hole in overflow body for exit of fresh water)
2 x Ocean Clear Canisters (1 w/bio media FULL & 1 w/std filter)
Reeflo Dart 3600gph external pump

Ready?
I think a majority of what is written here is geared toward W/D systems so I am trying to apply what I learn to what I want/have.

I built the Durso's to eliminate noise. I did NOT drill them as I think I need a vacuum sealed system. With a W/D sump, if the pump goes out or stops, the water will keep flowing into the sump because of the gravity feed.
In a closed loop system, the pump stops and the whole loop stops.

Here are my questions...
Do I need to drill through the overflow walls for the return lines?

If I don't do the above...
a) would I still get proper filtration?
b) wouldn't it eliminate ALL noise considering the water level would be constant?

Since the tanks 1" intake & 3/4" return are smaller than the pumps 2" suction & 1 1/2" return, am I losing flow rate?

I'm sure I'll have tons more questions to follow.

Thanks in advance,
Rob

 

[vanilla__gorilla__]

so your going to do a wet dry and inline pumps? If so what I would do is something different then that..........really or use two diferent pumps


oh and never mind that pm I sent it to the wrong person

 

[Wolf3101]

Ive set up several similar systems over the years. I call them sealed pressure systems. They are very quiet and safe. The only real drawback is that they rely on the O2 in the water for the biomass. For this reason I ran the outlets into several Marineland 'slave' biowheels for the extra wet/dry capacity.

 

[johnptc]

Since the tanks 1" intake & 3/4" return are smaller than the pumps 2" suction & 1 1/2" return, am I losing flow rate?

.
yes.....what pump is this ??? sounds BIG !!!

what is the nominal flow rate of your pump ????

i set up several turtle tanks with fluvals by drilling two holes in the back of the tank in/out ....works great

 

[Lonewolfblue]

I'm not really familiar with closed-loop systems, other than canisters. So I'm not really sure on your setup. I'm sure you'll get more resonses from others. As for the pump intake and output sizes, I'm pretty sure you will lose flow, as you are taking away in the fitting sizes.

 

[crashinc25]

what pump is this ??? sounds BIG !!! what is the nominal flow rate of your pump ????

[FONT=Arial, Helvetica, sans-serif] The Sequence ReefFlo Dart is the quietest pump on the market. Ideal applications for this unit are aquariums 100-200 gallons. The Sequence Dart is great for close loop reef systems requiring high turnover. This unit is rated for moderately low head pressure and a mx flow rate of 3600 gph, shut off head of 12' and a maximum wattage of 160/1.4 amps. [/FONT]

• [FONT=Arial, Helvetica, sans-serif]Minimal heat transfer [/FONT]
• [FONT=Arial, Helvetica, sans-serif]Less than half the watt draw of comparable submersible pumps! [/FONT]
• [FONT=Arial, Helvetica, sans-serif]Units are pre-wired with an 8' cord and molded 115V plug. [/FONT]
• [FONT=Arial, Helvetica, sans-serif]Housing is GLASS REINFORCED POLYPROPHELENE. [/FONT]
• [FONT=Arial, Helvetica, sans-serif]Quiet operation [/FONT]
• [FONT=Arial, Helvetica, sans-serif]3 year warranty[/FONT]
• Out-of-pond construction - NOT Submersible!
• 360gph @ 0' head
• Silicon Carbide seals and designed for SALTWATER use!
• Ports are 2" Female suction and 1.5" Female discharge.
• Housing is molded of PVC plastic for added efficiency.
• Quiet operation

John, do you think re-drilling the tank for this pump to match the sizes makes sense? That kind of limits any changes down the road. I dunno what to do.

 

[crashinc25]

so your going to do a wet dry and inline pumps? If so what I would do is something different then that..........really or use two diferent pumps

I actually ONLY want to run the closed loop system. I have enough stuff to keep this tank crystal clear with all params at nothing with this system so I think a W/D is a waste in this case.

It will likely be 1 system with a backup like a big older canister I have running for redundancy.

 

[crashinc25]

Ive set up several similar systems over the years. I call them sealed pressure systems. They are very quiet and safe. The only real drawback is that they rely on the O2 in the water for the biomass. For this reason I ran the outlets into several Marineland 'slave' biowheels for the extra wet/dry capacity.

I am getting water agitation through the overflows and I will have air bars/stones in the tank for O2. At even half the pump rate, I'm still going to be pulling 1800gph through the system. Agitation? you bet!!

I consider this closed loop system a canister filter on steroids. It is completely sealed.

 

[johnptc]

[FONT=Arial, Helvetica, sans-serif]The Sequence ReefFlo Dart is the quietest pump on the market. Ideal applications for this unit are aquariums 100-200 gallons. The Sequence Dart is great for close loop reef systems requiring high turnover. This unit is rated for moderately low head pressure and a mx flow rate of 3600 gph, shut off head of 12' and a maximum wattage of 160/1.4 amps. [/FONT]

• [FONT=Arial, Helvetica, sans-serif]Minimal heat transfer [/FONT]
• [FONT=Arial, Helvetica, sans-serif]Less than half the watt draw of comparable submersible pumps! [/FONT]
• [FONT=Arial, Helvetica, sans-serif]Units are pre-wired with an 8' cord and molded 115V plug. [/FONT]
• [FONT=Arial, Helvetica, sans-serif]Housing is GLASS REINFORCED POLYPROPYLENE. [/FONT]
• [FONT=Arial, Helvetica, sans-serif]Quiet operation [/FONT]
• [FONT=Arial, Helvetica, sans-serif]3 year warranty[/FONT]
• Out-of-pond construction - NOT Submersible!
• 3600gph @ 0' head TYPO not 360
• Silicon Carbide seals and designed for SALTWATER use!
• Ports are 2" Female suction and 1.5" Female discharge.
• Housing is molded of PVC plastic for added efficiency.
• Quiet operation

John, do you think re-drilling the tank for this pump to match the sizes makes sense? That kind of limits any changes down the road. I dunno what to do.

for the intake to the pump you could just run siphon tubes to it.....maybe two 1.5 inch pvc pipe ....dont need to drill the tank

i am currently running 3 inch flex pvc siphons with no problems........i use a garden hose and a tee fitting to prime the siphon


depending on how much back pressure the filters have......it will reduce the flow rate quite a bit and the 2 inch intake maybe overkill...... eg if the back pressure cuts the flow to 1800gph.....a 1.5 inch intake would probably work fine....

 

[CHOMPERS]

for the intake to the pump you could just run siphon tubes to it.....maybe two 1.5 inch pvc pipe ....dont need to drill the tank

i am currently running 3 inch flex pvc siphons with no problems........i use a garden hose and a tee fitting to prime the siphon


depending on how much back pressure the filters have......it will reduce the flow rate quite a bit and the 2 inch intake maybe overkill...... eg if the back pressure cuts the flow to 1800gph.....a 1.5 inch intake would probably work fine....

At zero back pressure in the filters, the pump will push 3600gph at six feet. (20 turnovers.)