350g Filtration Plans

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TheBigB

Jack Dempsey
MFK Member
Nov 1, 2011
503
3
33
North Texas
I've had a 8' x 3' x 2' acrylic tank sitting in my garage since June and its killing me! The reason its not set up yet, is I have to do some construction on the house to get it all set up for the in-wall build. The timing just hasn't been right. I've found some time to work on finalizing my plans to hopefully start working on the filtration room. I wanted to get it on paper and available for critiquing so I can dial it in the best I can the first time around. A large part of this build is based on my trials and tribulations from a 420 gallon build I did about 6 years ago. I learned alot through that process and am hoping to carry over my successes and avoid the failures best I can.


Starting with the tank, here is the flow of the design
- I plan to drill the main tank on the end closest to the filtration room. I'm not 100% sure yet on the method I want to use, but either an overflow box with a weir or maybe the bean animal style. Not sure yet, but I welcome suggestions. My last tank I used durso standing pipes which worked flawlessly and may be the way I go if another better option doesn't present itself.
- Water goes from the overflow into a 55 gallon sump that begins with a filter floss tray. Any suggestion here? My plan is to just create a tray and shove it full of filter floss. I've used socks in the past and I just loath washing those things.
- Second compartment in the sump is a grow out / refugium. This is also where the heaters will be.
- Next the water drains via gravity into a 55 gallon drum running a fluidized bed. I am going to attempt to fluidize using the pressure from the water entering the tank, but I may be adding air stones in order to get the proper movement.
- Do you think this is enough sump? With both 55 gallon tanks, the actual water volume will most likely be closer to 80 gallons. I used a similar set up on my other tank and it seemed to work fine, but I would rather over do than under do if you know what I mean. I've thought hard about replacing the 55 with a 75, but I already have the 55.
- I have a reeflo dart that will then pump the water back to the opposite side of the tank. Do I need to go all the way to the other side of the tank or can I pump it back in from the same side as the overflow with wavemakers placed strategically around the tank to keep things from getting stagnant.

- You will also see in the picture that I have a RO Water Holding tank. My plan here is to do an automatic water changing system using RO water. RO water will fill the holding tank where I will have an autodoser set up to remineralize. The water will either continuously drip into the sump where I have an overflow drain set up, or I will use a timer to do regular changes daily. Has anyone set something up like this? I would be very interested to pick your brain or read another post about how it was done.

The second picture is a rough layout of what this will look like from above. The tank will sit in the "back room" with a viewing panel through the wall into the living room. The right side of the tank will rest up against the wall where the filtration room is located. I designed this house around this setup so all the necessary headers and such are already installed.

Please feel free to critique/give advice in any of the areas you see I might could use it. I've been keeping tanks successfully for over 15 years, but I'm always looking to find a better way and always welcome constructive feedback.

Happy New Year!


350 in-wall filtration concept 2020-1230.jpg

350 in-wall layout concept 2020-1230.jpg
 
When you are using the RO drip where is the excess going to drain, the diagram makes it look like it is the fluidized bed/pump chamber which also looks like where you will be putting the new water in
 
When you are using the RO drip where is the excess going to drain, the diagram makes it look like it is the fluidized bed/pump chamber which also looks like where you will be putting the new water in

Yeah so the clean remineralozed water with go into the fluidized bed chamber. The waste water will go into the drain. Its not pictured
 
It seems like if water is entering and exiting the same drum you're going to get a lot of bypass My water enters on the opposite end of the system from where the drain is so that it displaces the old water as it enters the system
 
It seems like if water is entering and exiting the same drum you're going to get a lot of bypass My water enters on the opposite end of the system from where the drain is so that it displaces the old water as it enters the system
Great point. Ill have to think about that. Maybe I'll drip into the main tank somehow...I could add a small pump and put it on a timer. Only other option I can think of right now is to raise the fluidized bed tank and pump up to it then gravity feed back to the main tank. Not sure i like that thought

Hmmm....
 
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That sounds nightmarish

A little pump in the drum with the RO dosing that creeps over to the main tank for a drip type set up or depending on how your drain on the display works you could drain and fill periodically,

My sump is drilled to over flow to the septic system so I turn a spigot and let it run but I am on a well
 
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That sounds nightmarish

A little pump in the drum with the RO dosing that creeps over to the main tank for a drip type set up or depending on how your drain on the display works you could drain and fill periodically,

My sump is drilled to over flow to the septic system so I turn a spigot and let it run but I am on a well

I've been thinking of a way to just tap it directly into the pump intake so it won't mix in the drum. I have a few ideas, just need to test it
 
Like celebrist celebrist said I'd do the drip in the main tank. That way your new water isn't just going out the drain. My other concern is the grow out in the sump. I've done this before as well and the problem it produces is that you will need to feed those grow outs, where does the uneaten food and waste go? Right into your biomedia. You could set up more mechanical filtration after that area to stop it or put the grow out before mech, but it's not as easy.
Honestly if your 120 and 55 are drillable I'd use the 120 for filtration and the 55 for grow out plumbing the 55 in to run off of either a separate pump or a t from your existing pump. It could easily be drained into your filtration. Once I set up my last system like this it made everything easier and healthier.
 
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