Poor man nutrients control - Donovan's Nitrate Destroyer

steeb

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I'll give a quick update. I had this running for a few months and the nitrate went to 5ppm from well over 100ppm. I was adding at one point up to 12ml of vodka,vinegar ro mix daily until a white film developed on the glass then scaled back and kept around 9ml a day. The system does clog or maybe it's my pump. All I have is about half full of ceramic rings on both sides.

I had to travel a bit for work and the system clogged / skimmer wasnt going every day. Right now it's at about 60-80 ppm and Ill test again in 2 days to see if it's dropped any. I do notice that if it clogs for long enough, a few days I will smell the sulfer.
 

Difrano

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Wow I found this thread and is awesome, I did something similar with a freshwater planted aquarium with a deep dirt/sand bed that became self sustainable with no water changes for years. So sad for the tragic death of Donovan RIP. I am thinking about building one of those for my new RSR 250, this idea is great. Cheers to him!
 

Devaji

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skimmed this thread a bit but always have been curious.

I am thinking of a pretty big FOLWR system 375 gal and for filtration I would be running:
filter floss
UV set for parasites
skimmer
ATS
possable fuge to grow maco to feed the tangs
would adding a DND to the mix be a good idea?

I love the fact it can be DIY for pretty cheap.
 

Feet4Fish

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You initially filtration plan is solid and I would wait for the DND until your ATS and bio load mature. It is easy and cheap enough to add on down the line if needed. Just my $0.2. Also for a FOWLR consider aggressive mechanical filtration which also helps a great deal!
skimmed this thread a bit but always have been curious.

I am thinking of a pretty big FOLWR system 375 gal and for filtration I would be running:
filter floss
UV set for parasites
skimmer
ATS
possable fuge to grow maco to feed the tangs
would adding a DND to the mix be a good idea?

I love the fact it can be DIY for pretty cheap.
 

Devaji

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You initially filtration plan is solid and I would wait for the DND until your ATS and bio load mature. It is easy and cheap enough to add on down the line if needed. Just my $0.2. Also for a FOWLR consider aggressive mechanical filtration which also helps a great deal!
I was thinking the same thing too. be pretty easy to add down the line if I needed.
what you you recommend for the "best" mech. filtration then?
 

Feet4Fish

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You can go many ways.... I employ three at different times.
1. Sequential filter pads/socks that take it from 200-100 microns sometimes down to 50 if wanted. I built my own sump so incorporated this flexibility.

2. Micron filtration through a pleated cartridge . These are phenomenal and topical can filter as low as 20 microns

3. DE filtration which can be incorporated intermittently with your cartridge which can filter down to 1 micron

not only does mechanical filtration remove the particulate matter so it can’t become a nutrient problem but if used right can help you in parasite management
I was thinking the same thing too. be pretty easy to add down the line if I needed.
what you you recommend for the "best" mech. filtration then?
 

DancingWind

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I was thinking the same thing too. be pretty easy to add down the line if I needed.
what you you recommend for the "best" mech. filtration then?
Best!? As in effective and convenient? Probably an Automatic Rollermat
Best as in no poop goes through? probably a basket of filter floss.
 

T-MIKE

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Do I still need a skimmer if I build this?? Seems like it takes care of the nitrates pretty well.
 

DancingWind

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I would like to share my not so poorman's reactor:
IMG_2134.jpg

its a 2x40cm of 110mm PVC-U pipe + fittings
Its expensive ~110eur (and the pipe itself was free since it is from scrap heap)
Its very heavy this is high presasure stuff
and its bomb proof.
6L of media

All the pieces:
IMG_2072.jpg


The flow is: ro press fiting scres inot 3/4" screw/ 16mm fiting
-> 16mm T fitting (other open end is for vodka)
-> 16mm to 20mm insert
-> 20 to 65mm insert
-> 65mm pipe/threaded/pipe set
-> 65mm to 110mm adapter
-> 110mm 110mm joint
-> 110mm pipe
-> 110mm end cap
that is one tower
outlet tower is the same except after 65mm pipe/thread/pipe set it ends with a 65mm end cap - I will drill a small hole and put in small hose for outlet
towers are conencted at the bottom by a 25 mm pipe piece

here is my progresion pictures:
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assembly - just add pipeof any length you want
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glueing:
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20mm to 65 adapter glied into 65mm "screw"
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I decided not to glue the part above to the main chaimber sections below (aka 65-110mm adapter to 110mm pipe joint) - will try a bit of teflon tape as they already fit quite snugly
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Drilling the bottoms
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plenty of meat for glue to bite into
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bottom conenction using 25mm pipe section - very solid
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Some reinforcement at the top just 25mm pipe pieces glued side by side
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I will also for now friction fit the input T adapter - it will not be glued in just friction fitted with teflon to the main body (20mm adaper -> 20-65mm fitting)
IMG_2135.jpg


Now the funny bit :)
From the time I decided I want one, bought pvc-u, got all the tools (all tools were taken to another property by my parents .. it's funny when on saturday afternoon you realize you have hammer and a rusty hand saw for pvc gluing) and the time I built (almost 2 months) - I managed to get my nitrates down to a very steady 25-30ppm ish (nyos nitrate kit) and I must say i'm quite happy with that so for now .. the reactor goes on the shelf :/
 

CONRA

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I used to have a DSB (4 inches) on my Marine tank, always read 0 nitrates for last 3 years . Tank had a leak and when I put it back, I removed the deep sand bed, after 6 months my nitrates went up to 80ppm, when I read this article I decided doing mine, after a week I have zero nitrates going out of the filter and my tank is at this point at 20ppm and dropping, tank size is 400 galons (including sump) so far no problems, I will do a second one for my other 100 gal tank. used cheap 4 inches drainage PVC and only electrical corrugated pipe conduct on the first chamber and mostly small pumice stone on the second just added de-nitrate from seachem as the last stage, you can see the output bubbling (nitrogen I guess), thanks to Donovan (RIP) and other contributors

denitrater front.jpeg denitrater out.jpeg denitrater back.jpeg before and after.jpeg
 

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