Using RO water - Tropical Fish Keeping - Aquarium fish care and resources
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post #1 of 13 Old 10-28-2006, 03:24 PM Thread Starter
Using RO water

Do i need to add anything to the RO water to make it fish safe?
trreherd is offline  
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post #2 of 13 Old 10-28-2006, 03:40 PM
If you're using 100% RO water, then you need to add back some additives. There are a few readily available. If you're mixing RO/tap water, then you should not have to.

Is there any reason you are using RO water? Breeding, pH too high (above 8.0), too much ammonia or nitrates?
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post #3 of 13 Old 10-28-2006, 04:42 PM Thread Starter
The reason i am using RO water is because pretty soon i am going to be doing a saltwater and i will need RO anyway
I do not have my own ro filter but i get it from a vending machine at a grocery store i keep it in 5 gallon jugs It is 39 cents a gallon so thats pretty sweet
My dad recemended i use it because we have well water and we have a water softener(adds salt)and we were not sure if it was good for the fish.
Is there negetives to using ro water?
Should i stop using ro and just use my well water?
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post #4 of 13 Old 10-28-2006, 06:24 PM
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i agree!! R/O water is the way to go with aquaria, that way you are completely in control of the water chemistry you are not victim to the spikes of pollution in tap water.

You will have to harden the water, i use mineral salt from sera and i then boost the hardness with KH plus from sera, the harder the water the more CO2 it will absorb before pH crash sets in.

I dose every 5gallon of r/o water with a palm of mineral salt, 7ml of KH plus, 7ml of plant fertiliser.
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post #5 of 13 Old 10-28-2006, 11:44 PM Thread Starter
sounds good
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post #6 of 13 Old 10-29-2006, 10:54 AM Thread Starter
wait-were can i get these?will your average petsmart carry them?-and y do you use plant fertalizers?is it for the plants or is there a different reason?
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post #7 of 13 Old 10-29-2006, 11:01 AM
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Originally Posted by trreherd
and y do you use plant fertalizers?is it for the plants or is there a different reason?
Not really necessary with the sufficient nutrients available in your tank however they can be added to ensure enough supply of nutrients.
In my case, I stopped using ferts. Yet my plants are still growing like crazy.

Every lfs and even chain stores should carry them in stock.

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post #8 of 13 Old 10-29-2006, 11:47 AM
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Well i use fert for plants because i am using R/O water which has nothing in it, mineral salt is really for the fish so their scales function correctly, but it also helps open pours of plants. The fert is the food for the plnts, fih waste can only do so much, plants need iron to grow well. If you dont have enough iron in your tank you will see your plants turn yellow or pale green.

You probably wont see it in aerage stores even in america, you will prob have to go to a dedicated aquatic store, or buy it online.

Take care of your plants and they will take care of your tank for you. I always say there is a difference between your plants surviving and just growing toward the light, and your plants thriving where they are happy at the level they are planted and grow along/out as well as up. I know my tank would not look as good if i didnt use fert, and it wll improve further when i start to use ada daily fert.
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post #9 of 13 Old 10-29-2006, 12:44 PM
You will see the better high end RO/DI filters in the high end LFS/LPS. Places like Petsmart or Petco only buy those cheap filters that does not remove allot of the minerals. Since you will eventually go with salt water, look into buying an RO/DI unit that removes 99% of the particulates in the water. These units are at minimum, 3 stage units. Don't forget, RO/DI units produce the water in gallons/liters per day, so it will take a LONG time to produce enough water to fill a tank. So you can select between 30 GPD (Gallon per day) or 60 GPD units for example. Therefore, you will need to store the water, so make sure you look into a water storage container. You can use food grade water drums, but they are usually expensive. Most people just use garbage cans made by Rubber Made.

FYI, RO/DI units produce allot of waste water, so it's normally best to plumb the system close to a fresh water pipe and also a drainage pipe. Allot of people I know use the waste water created, which contains allot of the minerals, for their planted tanks, FW aquariums, watering household plants. I even know a guy who raises CBW (california black worms) with the waste water.
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post #10 of 13 Old 10-30-2006, 06:34 PM
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good point eddie- i can turn over 25 gallons a day and i have 4 x 5gallon wine fermenting drums, the footprint of a successful aquarium lol!
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