refug in a 55 gallon
i have a 55 gallon tank and i building a sump for it its gonna be a 10 gallon sump. after the sump im getting a aqua clear filter and turning that into a refug. would it be a good idea if i put a refug in the sump and the filter? i heard that its useless in some tanks cause its too small or something.
Personally, with the conversations you and I have had over the last week, I see no reason for multiple refug on your aquarium. The addition of a single refug is a nice feature that may help depending on your fish selections.
would i need two like that or would one be good? do i really need it ?
I do not use a refug on a fish only system, or fish only with live rock. I only see the benefits in select cases.
so i would only need a refug if i have like a reef right?
A refug is a luxury item for any marine aquarium. It helps with stability by adding to the water volume. It provides a place to cultivate macroalgae and a place for live foods such as copepods and amphipods to thrive. Some species of marine fish require copepods and amphipods in their diet to live, such as the mandarine goby.
Like most questions in this hobby, it is not about what you equipment you need. It is a question of which fish you intend to keep.
Re: refug in a 55 gallon
Fuge should be 10% of display volume (ie; 55g tank, 5g fuge)
Sump must have enough empty space to take on the water drop in the event of power loss. A 1" drop in surface level in the display will raise the level in a 10g by 3", add in the volume contained within the plumbing and skimmer and your looking at another 2". That means during normal operation, your sump's water level could never be more than 7" deep. Any more than that and you'll be looking at a flood next time you lose power
The return section will need to have enough room for the return pump to remain completely submerged. If your pump is 4" tall (a fair estimate for a system of your size) then you will need your return section to maintain a water level at or above 5". Any less than that and you'll risk burning out your pump and potentially starting a fire.
Given the above two facts, you will have about 2" of allowed fluxuation in the water level in the return section of your sump. Even if your return section were to occupy 1/2 the span of the sump (which I might add, is now taking the space necessary for your fuge), that would amount to only 0.85 gallons of water. Given the current evaporation rate in my tank, I lose about 1.5 gallons per day. That number varies generally between 0.75 and 3.00 gallons per day based on several factors. That puts you at having to check and top-off your system religiously 2-4 times per day.
Personally, I'd recommend a 30g long for a sump on your system, but you could get away with a 20g. If you cant go that large at current, I'd recommend you go without a sump at all until you can.
ok so ima go with a 20 gallon sump with my 55 gallon. should i set up a refug in the sump?
Eric Borneman is one of my personal favorite authors in the hobby. He does a great job of addressing the topic, so i thought his comments would be helpful.
Here is the link to Eric's full article, if you care to check it out:
Personally, I would add the refugium. Here is a look at the plans I created/used with my first sump for my 55.
As a side note, I would increase the width of the return section by about 2 inches. This will decrease the volume of your Refugium to about 6 gallons (still within the recommended 10%) but will provide more room for evap in the return chamber. You may also consider increasing the distance between the bubble trap chambers to 1". This will slow the water flowing through the bubble trap, resulting in fewer microbubbles entering the Fuge. Those are just a few of the changes I had applied to future versions of the sumps I have built.
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