Help: Chiller return

[klim]

Hi,

I would like to seek advice on what pump should I use for the above chiller.

For info:

1. Chiller sitting on the floor and main tank top is about 2m vertical.

2. Water from sump to chiller to main tank

I have tried 400gal/hr and t cannot make it, water outlet in main tank is like children peeing....sianz.

Please help me as I am at a lost what and how should I do? Should I take water from sump and return back to sump (although this will cost less electricity but it will caused my Main Tank to fractuate from 28degree to 31degree.

[fishlife]

a 2k lph pump will do.... last time i used a weipro 5000 with my teco ra680

[jyoon]

I think its not the size of the pump, its the height the pump can do.

[klim]

The height from the chiller to Main Tank is about 2meters plus piping to Sump another 2ft.

So what size of pump will enable me to have it cause some flow to the Main Tank and not going through the chiller too fast and not able to chill down the temperature.

I know it is a tough question and hope to see more advice.

:thank:

[Thexder]

I use Eheim 1262 to pump from sump thru chiller then to main tank. I'm using Resun 650 chiller.

[klim]

I use Eheim 1262 to pump from sump thru chiller then to main tank. I'm using Resun 650 chiller.

Hi Thexder, thanks.

How is the flow in the main tank.

Is yours 2meters in height with some elbow bend? Hope to findout more info as to guage better.

[reeftask]

I use a 8000 liter pump to flow from my sump to my tank. Flow rate seems ok but not considered strong because I had separate out to 9 outlets in the tank. Considered you using a chiller, I advise dont do it this way. You will damage the chiller joints internally and will leak after sometime. Why dont use the rule: inlet and outlet of chiller back to sump? My tank height is 1.5 meter and the joints are added to 1 meter plus on each side horizontally.

Your pump had to pump 2 meter high so the back pressure will force your chiller to leak after certain time.

400gal/hr pump sure like child's pee. It is not even suitable for your chiller when its 1 feet length. 1 feet length uses at least 600gal/hr pump. Moreover yours is vertical 2 meter! You need a big flow pump but will destroy your chiller coil. Chiller are not design to take load of vertical back pressure of such height. Pls survey your chiller datasheet and you will understand.

[klim]

I use a 8000 liter pump to flow from my sump to my tank. Flow rate seems ok but not considered strong because I had separate out to 9 outlets in the tank. Considered you using a chiller, I advise dont do it this way. You will damage the chiller joints internally and will leak after sometime. Why dont use the rule: inlet and outlet of chiller back to sump? My tank height is 1.5 meter and the joints are added to 1 meter plus on each side horizontally.

Your pump had to pump 2 meter high so the back pressure will force your chiller to leak after certain time.

400gal/hr pump sure like child's pee. It is not even suitable for your chiller when its 1 feet length. 1 feet length uses at least 600gal/hr pump. Moreover yours is vertical 2 meter! You need a big flow pump but will destroy your chiller coil. Chiller are not design to take load of vertical back pressure of such height. Pls survey your chiller datasheet and you will understand.

thanks bro reeftask for the advice. Will take note and read the manual.

[Underwater]

Your pump had to pump 2 meter high so the back pressure will force your chiller to leak after certain time.

400gal/hr pump sure like child's pee. It is not even suitable for your chiller when its 1 feet length. 1 feet length uses at least 600gal/hr pump. Moreover yours is vertical 2 meter! You need a big flow pump but will destroy your chiller coil. Chiller are not design to take load of vertical back pressure of such height. Pls survey your chiller datasheet and you will understand.

Wow, didn't know of that...l've been pumping my chiller returns directly into main tank vertically at 2 ft height. Will there be back pressure even if the pump is running?

[Gouldian]

Actually, all pumps will experience some form of back pressure when subjected to reduce pipe size, elbows, vertical height, equipments such as FR etc.

That's why most reputable pumps will indicate its max head so that consumers will be aware of its performance in different situation.

When choosing a pump, always look at the flow and the max head. A pump with a 3000l/h with a 2m max head will definitely push more water than a pump with 3500l/h with 1.2m max head.

HTH

[Underwater]

Thanks Bro Gouldian for the info.

Now not sure if i shd shift back my chiller return outlet from my main tank back to my sump since i can't shift up my chiller?

[tineng]

my heat exchanger also sit at the the top of tank, more then 2 meter from the sump....what I did instead is use a aquabee 2000 pump and pump it direct from the overflow box to chiller and back to main tank (mine running dorsa pipe, so got some space)...use less electricity and have less heat load...

when i change water the tank would still be cool as it forms a close loop between the main tank and the overflow box....

[Gouldian]

my heat exchanger also sit at the the top of tank, more then 2 meter from the sump....what I did instead is use a aquabee 2000 pump and pump it direct from the overflow box to chiller and back to main tank (mine running dorsa pipe, so got some space)...use less electricity and have less heat load...

when i change water the tank would still be cool as it forms a close loop between the main tank and the overflow box....

You are right bro, if getting a pump with sufficent head and flow is too costly. You can always think out of the box by shifting the location of chiller or pump or even the chiller outlet.

For me, due to the horizontal distance of my chiller, I chose to have the chiller water intake on the first compartment of my sump and the oulet at the last compartment of my sump. I then rely on 2 very efficient return pump to push water back into the main tank.

Btw Tineng, I am embarking on my own DIY similiar to yours but doing it personally.

[Thexder]

Hi Thexder, thanks.

How is the flow in the main tank.

Is yours 2meters in height with some elbow bend? Hope to findout more info as to guage better.

Roughly 2 meters including some flexible hoses. Vertical height around 1.5-1.6m.

[reeftask]

You are right bro, if getting a pump with sufficent head and flow is too costly. You can always think out of the box by shifting the location of chiller or pump or even the chiller outlet.

For me, due to the horizontal distance of my chiller, I chose to have the chiller water intake on the first compartment of my sump and the oulet at the last compartment of my sump. I then rely on 2 very efficient return pump to push water back into the main tank.

Btw Tineng, I am embarking on my own DIY similiar to yours but doing it personally.

2 pumps for return. good investment in case anything happens, you will still have the time to delay a bit.

I did think of installing the chiller taking water from tank and flow back to sump. The problem I didnt do it because the dirts from the tank will stuck in the chiller's coil. So I have to frequent flush the chiller which I hate most. Some dirts are stubborn and even flushing will not get them out.

I did think of chiller taking water from 1st compartment and release to last compartment. The problem is I dont want the sudden cool water to be release to the main tank with corals. So decided chiller take water from last compartment and release to the first compartment.

[reeftask]

Actually, all pumps will experience some form of back pressure when subjected to reduce pipe size, elbows, vertical height, equipments such as FR etc.

That's why most reputable pumps will indicate its max head so that consumers will be aware of its performance in different situation.

When choosing a pump, always look at the flow and the max head. A pump with a 3000l/h with a 2m max head will definitely push more water than a pump with 3500l/h with 1.2m max head.

HTH

there is 2 different things we have to observe. Pressure and Flow are two different things but linked to each others. Best is to see the pump's chart before proceeding to buy. I always survey before buying.

the 3000l/h with a 2m max head is a higher pressure pump and not neccesary will have higher flow than the 3500l/hr with 1.2m max head. It depends on the both pump characteristics base on height and length so the pumps' charts will tell you everything. If the length is 1 feet, the 3500l/hr pump will definitely perform better.

[Gouldian]

there is 2 different things we have to observe. Pressure and Flow are two different things but linked to each others. Best is to see the pump's chart before proceeding to buy. I always survey before buying.

the 3000l/h with a 2m max head is a higher pressure pump and not neccesary will have higher flow than the 3500l/hr with 1.2m max head. It depends on the both pump characteristics base on height and length so the pumps' charts will tell you everything. If the length is 1 feet, the 3500l/hr pump will definitely perform better.

Pump charts show the values of flow vs head. Some manufacturers will include pump chart while others will include just flow and max head and for the user to do their own estimation.

I agree with you a 3500l/hr 1.2m head pump may performace better than a 3000l/hr 2m head pump at ZERO head ie, exit directly with pipings or elevation etc.

I stand corrected on my statement "A pump with a 3000l/h with a 2m max head will definitely push more water than a pump with 3500l/h with 1.2m max head." as I was speaking in the context of the earlier posts of wanting to push water into the tank with 1.5m height.

[reeftask]

Klim, I think you have learned what you needed. Dangling here again will not learn anything. Just go ahead with what you want.

[Gouldian]

Klim, I think you have learned what you needed. Dangling here again will not learn anything. Just go ahead with what you want.

You are right... I am wrong to have even contributed.... I shall stay far away from your posts in the furture.... Happy now???