How to control humidity in fish tank room

degibson84

New member
So i have two tanks in my finished basement at the moment a 75 and a 220. Once the 220 is cycled the 75 goes away. My issue is that the humidity is so high in the basement from the tanks that we are getting condensation on the walls and on the floors which in time turns to mold. My wife wants to put a dehumidifier in and i told her over my dead body will i be topping off 10 gallons a day. tanks both run around 78 degrees and i was wondering if i lowered the temp a little would the humidity in the basement drop as well? If not is there any other way to control humidity?
 
I dont think a dehumidifier by its self would be enough. Think of the room as a cold glass of water on a warm day. The glass will sweat. Bringing the room closer to the temp. of the tank or vise versa. A chiller to drop water temp would would reduce evap.
 
I run a dehumidifier in my basement. It is set to 50% hunidity. My topoff rate is usually around 2-3 gallons. Tank stays about 79 degrees
 
2-3 gallons per day would put my pump out of the water. my return section of my sump has small dimensions i top off a gallon everyday when i get home from work. Looks like i will have to add an ATO
 
I dont think a dehumidifier by its self would be enough. Think of the room as a cold glass of water on a warm day. The glass will sweat. Bringing the room closer to the temp. of the tank or vise versa. A chiller to drop water temp would would reduce evap.
I wouldn't need a chiller would I? I think just dropping the heater down would work. My house temp is sitting at 69 right now. luckily it has been fairly cool the last few weeks
 
I feel sorry and give props to all the peeps that dont have ATO. These people are true dedicated fish lovers, not some lazy shmuck like me that doesnt refil the ATO for biweekly at a time.
 
I feel sorry and give props to all the peeps that dont have ATO. These people are true dedicated fish lovers, not some lazy shmuck like me that doesnt refil the ATO for biweekly at a time.

i do plan on getting an ATO just didn't want to spend the extra on one right now. also still debating Tunze, JBJ, or ATO.com
 
I'm afraid an air exchanger isn't going to fix your problem because of where you live. During the summer, my understanding is that Ohio gets just as hot and humid as North Carolina (where I live), it just doesn't last as long.

If you buy an air exchanger, you will be pulling in humid air at 90-95 deg F with a dewpoint of perhaps 70-75 degrees. Once your air exchanger removes the heat from the outside air (and puts it into the outgoing air), the inflow will be at 100% relative humidity.

It will rain in your basement like the Amazon.

You've two choices - either get a dehumidifier to run in the spring and fall, and use the house A/C to keep the humidity down in the summer, or add a window unit air conditioner to the basement (if that's possible, obviously) and run it from Spring to Fall with supplemental heat to keep the temperature correct in May and September.

By the way, all of these solutions are going to cost you way more in both purchase price and ongoing electricity costs than an ATO and 3 or 4 gallons of RODI per day will. That's assuming that you make your own RODI, which if you have a 220 gallon tank is a "must" anyway.
 
I'm afraid an air exchanger isn't going to fix your problem because of where you live. During the summer, my understanding is that Ohio gets just as hot and humid as North Carolina (where I live), it just doesn't last as long.

If you buy an air exchanger, you will be pulling in humid air at 90-95 deg F with a dewpoint of perhaps 70-75 degrees. Once your air exchanger removes the heat from the outside air (and puts it into the outgoing air), the inflow will be at 100% relative humidity.

It will rain in your basement like the Amazon.

You've two choices - either get a dehumidifier to run in the spring and fall, and use the house A/C to keep the humidity down in the summer, or add a window unit air conditioner to the basement (if that's possible, obviously) and run it from Spring to Fall with supplemental heat to keep the temperature correct in May and September.

By the way, all of these solutions are going to cost you way more in both purchase price and ongoing electricity costs than an ATO and 3 or 4 gallons of RODI per day will. That's assuming that you make your own RODI, which if you have a 220 gallon tank is a "must" anyway.

Oh i was not aware of that , i'm a beaver from Canada, or a polar bear depending how you see it lol. We have 4 months of mild weather and 8 months of cold and kina dry. From what your describing to me now if Jacque Cartier who discovered Canada in 1534 was standing in front of me now...i'd beat the crap out of him lol. 90-95 oF is that summer only what winter if you have one....
 
I'm afraid an air exchanger isn't going to fix your problem because of where you live. During the summer, my understanding is that Ohio gets just as hot and humid as North Carolina (where I live), it just doesn't last as long.

If you buy an air exchanger, you will be pulling in humid air at 90-95 deg F with a dewpoint of perhaps 70-75 degrees. Once your air exchanger removes the heat from the outside air (and puts it into the outgoing air), the inflow will be at 100% relative humidity.

It will rain in your basement like the Amazon.

You've two choices - either get a dehumidifier to run in the spring and fall, and use the house A/C to keep the humidity down in the summer, or add a window unit air conditioner to the basement (if that's possible, obviously) and run it from Spring to Fall with supplemental heat to keep the temperature correct in May and September.

By the way, all of these solutions are going to cost you way more in both purchase price and ongoing electricity costs than an ATO and 3 or 4 gallons of RODI per day will. That's assuming that you make your own RODI, which if you have a 220 gallon tank is a "must" anyway.
maybe its just me but wont a dehumidifier just pull water out of the tank not the moisture in the air? since the water content in the air is not as high as 250 total gallons of water just sitting in a tank and sump
 
maybe its just me but wont a dehumidifier just pull water out of the tank not the moisture in the air? since the water content in the air is not as high as 250 total gallons of water just sitting in a tank and sump

Well kina. The way it works is that the dehumidifier has coils running cold collecting ambiant humidity in the room generated by your tank. Now that humidity instead of going on your wall , windows carpet floors etc should in theory go to the dehumidifier because he's colder and with his fans attracks and process the ambiant air faster. However your tank will compensate that effect by releasing more mostiure into the air its like and osmosis effect, the more humidity is taken away from the room , the more the tank will compensate the loss of it. Its basic physic. But Its either that or your walls bleeding water and drinking like a sponge. Your basically putting a humidifier (your 250G tank) versus a dehumidifier both plugged on your hydro bill. Life is grand.
 
I started running a dehumidifier in my garage fish room.
Pulls at least 4g a day. It has it's pump so it drains directly into my sink.
Is it causing me to go through ATO faster? Not really sure. Did it stop everything from rusting in my garage? YES.
 
I use a dehumidifier in my basement fish room and it works just fine. without it it feels like you are swimming down there. I keep it at 60% and all is well. No ATO (yet) I use ~ 2g/day in a 300g total system
 
Be careful with dehumidifiers. I tried one in my fish room, and the heat that it creates raised the temperature of the room to 90 degrees. Guess what that did to the water temp in my sump, which then goes into my DT.
 
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