Best setup for 120g sump on 300g tank

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chiroken

Feeder Fish
MFK Member
Nov 3, 2012
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Vancouver Island, BC Canada
Th main tank is planned to house a mix of African peacocks and haps, probably medium stocking (cost dependant there, would love high density). I am unsure of how much bio filtration I will actually need and how to guess this? I do not plan on doing multiple W/C's each week. The plan would be a large, say 50%, W/C every 1-2 wks if I can get away with it.

I have a 6' 120 gallon sump that came with an 8' 300g tank that was previously saltwater. The sump had a couple of baffles with matala mat vertically between each baffle. 3 separate sections in the tank created by the 2 baffles. I'm freshwater and unsure how to set this up for maximum bio filtration with simplicity a key factor as well.

1 option was to have the sump wet and in the middle section between both sets of baffles rig up horizontal matting so that the water will move vertically through the media, then down (or up) the 2nd baffle and into the last chamber that would hold the heaters and the outlet to a reeflo hammerhead external pump. Both baffles would keep their media as well. Seems the simplest.

I'm now thinking of setting up a drawer tower (or 2) with media in the drawers and using the top skinny drawer to have flat quilting to be the mechanical filtration with the bottom of that top drawer drilled to create the tower as a trickle. The lower 2-3 drawers would have foam or matting for biofiltration. This would leave tons of open space un-utilized but I guess it may not be needed?

I can sit the drawer on the bottom of the tank (just slightly raised to allow water to flow out of the drawers) giving me maximal height therefore maximum media, or I can raise it up about 6" so the whole think is trickle. I will lose some media if I do this. I figure I will need about 6" of water in the sump when running so the outflow is always submerged. Overflow from the main tank if power is lost is about 5 1/2" or 17 gallons of water calculated at 2 inches of main tank depth. Only using about 1/2 of the sump height with this method. I will need to remove the baffles that are currently in the tank, creating 1 large compartment.

If I only use 1 set of pull out drawers for the bio, then I don't see why I can't get away with using a 75 or 90 gallon 4' tank. This would give me extra room/storage under the main tank as the 6 footer and the pump take up the entire 8 feet basically. Wondering if I should look for a cheap 75 and use it instead and try to sell the current 6' sump (might be a tough sell as I can't imagine many are set up to house such a big sump). I just bought a 55 and 65 that got filled today that are to be grow out tanks.

Any ideas, insights, or suggestions appreciated.
 
If you are looking for low maintenance I would do as follows:
First chamber: mechanical filtration like Poret foam (http://www.swisstropicals.com/Poret Filter Foam.html) or some sort of matting.
Following chambers: Bio media such as Seachem Pond Matrix held in mesh bags to make cleaning easier. A 20L bucket of Pond Matrix should be plenty to keep your ammonia in check.

In regards to the Hammerhead pump, IMO it's overkill and a waste of electricity for your situation; it pushes around 5,000GPH at 6' head on 350 watts. That's over 16x turnover and totally unecessary. Here's what I would do:

Two Laguna Max Flo 2000s: 1,360GPH @ 6' head on 80 watts each (Laguna Product Catalog Here)

You'll have a total of 2,720GPH on just 160 watts. (You may even find that this is too much flow, since this puts you at 9x per hour which is on the high side). The benefit of running two pumps is that if one fails, the other will keep your system up and running. The Laguna's are quieter than the Hammerhead (IME) and they are submersible so you will gain the real estate that the Hammerhead takes up under your stand. You should be able to sell the Hammerhead for around what the Lagunas will cost you and if not, the electrical savings over time will offset any difference and then some.

In regards to downgrading to a smaller sump, I wouldn't do it. Running a larger sump increases total system volume (which is always a good thing) and it also gives you more room in the event of a backsiphon.

Can you share pix of the tank and sump?
 
I would keep the 6' tank as more space can only help. i have the same setup for my 240 with a 125 and hammerhead under it and love it. current tank im working on is a 400 with a 240 under it. the hammerhead will go on this tank and a dart on the other. im not a fan of submersibles though but having 2 pumps running will always be better than one.
 
I wasn't a big fan of submersibles either until I got a Laguna. More efficient than any external (in almost every case), no seals to replace, they run quieter and you get the added benefit of heat transfer to your water. If you are running a sump in a basement or for whatever reason require a high pressure pump, you may have no other option than to go with an external, but for most standard under the tank sump setups, a submersible is going to be a better option.

The new DC pumps (Waveline, Diablo, Speedwave, Jebao) don't have a long track record so I'd be reluctant to try them out, but if they turn out to be reliable they blow any external or AC pump (including Lagunas) out of the water.

I envy you guys with low electric rates that don't have to worry about running efficient pumps.
 
I have a diablo dc5500 waiting to be hooked up.

Took a chance, but it seems like a great pump if it lasts. Time will tell.

I was going to use a Laguna but the sump is going to be fully exposed. The diablo was a little more compact and easier to plumb in my situation.


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I should have it installed in about a week or so. Going off their skimmer rep which is pretty solid. Going with a Reef Savvy Ghost overflow too.

The reefer in me is coming back out lol


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