Sumps?

[hollanda88]

Hello,

I currently have a 90L FW tank and am looking at moving into marine in a different 4ft tank thats currently unused and never has been.

I have looked about the forums and can't find a good topic on sumps as i don't know what one is. Could someone go through what a sump is and explain to me why they are useful and what they do please?

 

[Trod]

Have a look at this

http/www.melevsreef.com/links.html

 

[hollanda88]

I still can't see how the syphons work and how the over hanging thing works?

help!

 

[Trod]

OK try this

http/reefkeeping.com/issues/2003-01/gt/index.htm

Getting a bit to technical for me know, may be someone else can explain it in plain english

 

[ben1987]

a sump wouldnt usually siphon water out of the tank.

Google durso overflows and a weir. Thats the most common method. The water level will be at the hight of the weir. Then so long as you use big enough plumbing you will be able to achieve a decent flow rate through the sump

 

[hollanda88]

a sump wouldnt usually siphon water out of the tank.

Google durso overflows and a weir. Thats the most common method. The water level will be at the hight of the weir. Then so long as you use big enough plumbing you will be able to achieve a decent flow rate through the sump

Thats the bit I was having trouble with (the weir). I was reading about how to build a sump and they were going on about the weir and it causing a suction that could overflow the sump

 

[ben1987]

Right ok then i get ya.

A weir is usually situated in the corner of a tank.

like this

http/www.acaquatics.co.uk/durso%20&%...urn%20Small.jpg

The water level will be where the weir comb is. So water will get pumped up from the sump upping the water level in the main tank. Once the water rises past the level of the weir comb it will fall through the comb down the weir.

Usually down a durso overflow pipe or a stand pipe. Normally for this you would drill the bottom of the tank in the corner. Here you can see a tank fitted with a weir and with the bottom drilled.

This next pic os of a standpipe diagram. You can have it shorter that that in a weir as the water level is determind by the height of a weir. Having it shorter would stop water from standing in the weir.

Then a durso is like this

Its bent over so the water moves down it quieter. The top bit lets the air out. Dursos are generally considered to be the questest way.

Think all that made sense?

 

[hollanda88]

Sorry but i can't get the link to work

 

[ben1987]

Well thats a weir in the first pic that wroks anyway. Cant fix link i dunno whats wrong

 

[hollanda88]

Well thats a weir in the first pic that wroks anyway. Cant fix link i dunno whats wrong

Unfortunately that doesn't work either the other 2 pictures are fine. Is it hosted on the net somewhere?

Cheers, Andrew

 

[ben1987]

They were just pics of google images.