How many Gallons is your ATO Reservoir ???

Havasuviking · May 10, 2018

Finatik said:
#1) What size is your aquarium ??? (Gallons)

#2) What size is your ATO Reservoir ??? (Gallons)

90 gal reef tank
4 gal reservoir

Havasuviking · May 10, 2018

The River said:
Tank is Biocube 29g but estimate it to be holding about 25g.

ATO container is 7 gallons, lasts approx 2 weeks.

spent allot of time searching for affordable container larger than 5 gallons and found this one which is amazing and the cap it comes with allows a perfect fit for murloc fitting without driiling.

where did you get it?

miPapareef · May 10, 2018

In gallons:
75 DT
34 sump
5 ATO (Red Sea salt bucket)

I switch the bucket out every 3 days, and have 2 full buckets as spare.
I use a 44 gallon brute when I go away for exstended times.

Pivitol · May 10, 2018

Currently have a 200g DT and a 40B sump w/ a 5g ATO have to refill every other day in the winter, Very soon I am 86ing the 40 and going with a 100g sump and a separate 30gal fuge looking for reasonable ideas for a 30ish gallon ATO.

Saltdaddy · May 10, 2018

I have a 250gal and have a 5gal ATO.

ReefAddiction34 · May 10, 2018

14 foot reef said:
850 Gallon Reef
100 Gallon ATO

Just curious.... how much top off water do you go through in a week on an 850g system?

NinnJinn · May 10, 2018

125 gallon DT with a 30-gallonish sump.

Four 5 gallon HD buckets with lids that I fill/top off every other Sunday when the kiddos are with their mom.

Still using my Rodi system as a portable system at the moment.

Amado · May 10, 2018

I have a 125 gallon tank and a 7 gallon ATO
I lose about a gallon a day. I think after reading this I should upgrade.

Sleepydoc · May 10, 2018

chipmunkofdoom2 said:
My display is 20 gallons (24g total with sump). My ATO reservoir is 10 gallons. I'm thinking of upgrading to 22 gallons because I have the space and I'm getting tired of having to fill up the 10g.

Wow - I have the same size for my 120! You'd go crazy having to fill it up so often!

I have a 120 and a 10 gallon ATO reservoir - primarily because a 10 gallon tank was cheap and fit perfectly in the stand with my 40b sump. Lasts me about 1 week, depending on the weather.

There is no 'right' size for an ATO. At the extreme, you can have no ATO and do all the topping off manually. Besides what size will fit, you need too look at what your evaporation rate is and how often you are willing/able to refill the reservoir. Also, a couple safety considerations to keep in mind when sizing an ATO are would would happen if the ATO pump got stuck on and emptied the entire reservoir into your system? Would it cause a flood or catastrophic drop in salinity? It's unlikely, but in Chipmunk of Doom's tank, it could potentially be a problem.

dbl · May 10, 2018

120g with a home made acrylic 28g reservoir. Lasts me nearly two weeks.

AdamNC · May 10, 2018

29 gallon with a 5 gallon ato Lowes bucket.
40 gallon with a 5 gallon ato Lowes bucket.

Cjud7982 · May 10, 2018

Main display 210 gallons including sump. Ato comes from my mixing station which is 55 gallons of fresh water

Muttley000 · May 10, 2018

500 Gallon multi tank system.
32 gallon ATO reservoir

WWIII · May 10, 2018

Approximately 250 gallon system

Ato is 25 gallons

I also have (3) 50 gallon reservoirs for mixing, rodi storage and saltwater storage. I've been debating switching my ato to one of the 50 gallon containers now that I use GHL maxi doser for ato and awc.

Clownfish2 · May 10, 2018

110 gallon with a 10 gal ATO. I only fill to 7 gal in case ATO dumps it all in. Lasts me 8 days.

20 gallon QT with a 5 gallon bucket. Only fill it to 2 gallon mark. Lasts me 14 days.

vetteguy53081 · May 10, 2018

Have 18 gal for my 360g, 10 gallon for my 93g cube and a 5 gallon for my 25g cube.

chipmunkofdoom2 · May 10, 2018

Sleepydoc said:
Would it cause a flood or catastrophic drop in salinity? It's unlikely, but in Chipmunk of Doom's tank, it could potentially be a problem.

Possible, but highly unlikely. I use a DIY dosing pump that's run on an internal timer for my ATO. No float switches or other level sensors involved. It doses for a set amount of seconds every hour, no more, no less. It's wired to the normally open contact of the timer circuit's relay, so in order for the pump to fail on, the relay would have to fuse open. Since the peristaltic pump draws low current DC and the relay is rated up to 10A, this is unlikely.