Water Change techniques for larger tanks - Tropical Fish Keeping - Aquarium fish care and resources
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post #1 of 44 Old 05-18-2011, 02:00 PM Thread Starter
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Water Change techniques for larger tanks

Hi there,
I have a new 75 gallon tank. It will be planted with play sand substrate, and have Fancy Goldfish / bristlenose Plecos, Eheim 2217 canister fiter, and and Aquaclear back-up filter. That said, i want to know how people do water changes on such large aquariusm, say i need to do a weekly 25 - 50 % change (depending on final load of fish)? Honnestly, i wanted to use a hose and tap water, and only after to add the Prime to the aquarium, but i dont know if that would kill the good bacteries even if the fitlers are off. Otherwise, how do you handle such a large change? Thanks in advance.
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post #2 of 44 Old 05-18-2011, 07:38 PM
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Hi there,
I have a new 75 gallon tank. It will be planted with play sand substrate, and have Fancy Goldfish / bristlenose Plecos, Eheim 2217 canister fiter, and and Aquaclear back-up filter. That said, i want to know how people do water changes on such large aquariusm, say i need to do a weekly 25 - 50 % change (depending on final load of fish)? Honnestly, i wanted to use a hose and tap water, and only after to add the Prime to the aquarium, but i dont know if that would kill the good bacteries even if the fitlers are off. Otherwise, how do you handle such a large change? Thanks in advance.
You could use the Python Water Changer/Vacuum, The Aqueon or the one I use ,Lee's Ultimate Vacuum Kit which comes with an attachment that acts as a strainer for vacuuming. They all basicaly do the same thing, they attach to your faucet, you open the coupling to suck the water and then you close it to fill your tank. You can use them to do water changes, vacuum's or both.They also have a shut off valve near the end of the hose. The only big difference is price, the Python and Aqueon are usually around $47 up $99, and Lee's I purchased for $30 at my local Walmart then bought a Python brass fuacett adapter for $5. Hope this helps you

Last edited by Bigguy71; 05-18-2011 at 07:42 PM.
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post #3 of 44 Old 05-19-2011, 01:30 AM
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Quote:
Originally Posted by zfarsh View Post
Hi there,
I have a new 75 gallon tank. It will be planted with play sand substrate, and have Fancy Goldfish / bristlenose Plecos, Eheim 2217 canister fiter, and and Aquaclear back-up filter. That said, i want to know how people do water changes on such large aquariusm, say i need to do a weekly 25 - 50 % change (depending on final load of fish)? Honnestly, i wanted to use a hose and tap water, and only after to add the Prime to the aquarium, but i dont know if that would kill the good bacteries even if the fitlers are off. Otherwise, how do you handle such a large change? Thanks in advance.
You should add prime BEFORE you use the hose for re-filling the tank and use enough prime to treat 75 gallons .I use two capfuls from 8.5 oz bottle to treat 75 gallons, It is actually enough to treat 100 gallons but a little more prime won't hurt and is easier to dose this way.

The most important medication in your fish medicine cabinet is.. Clean water.
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post #4 of 44 Old 05-19-2011, 08:20 AM
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homedepot 5 gallon bucket, pre-rinse and use only for this tank. infact, get 2-4 while your there. siphon tank water into bucket ( or use hose to siphon ) and when you go to refill, place bucket infront of tank, fill bucket with hose water, add prime to bucket, slowly pour bucket into tank. thats as simple as it can get for adding prime before adding water and not having to carry buckets through the house, as they are right infront of the tank.
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post #5 of 44 Old 05-19-2011, 08:42 AM Thread Starter
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I want to try the Aqueon, just that i know my washroom faucet is not threaded, so hope there is an adapter for it
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post #6 of 44 Old 05-19-2011, 10:52 AM
if its not threaded, theres no adapter for it. I have the same problem in my house, faucets dont have threads, so i still fill by buckets.
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post #7 of 44 Old 05-19-2011, 11:19 AM
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May be able to find adapter that will fit wash machine spigot.
Might take a lot of hose depending on where washer is located.

The most important medication in your fish medicine cabinet is.. Clean water.
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post #8 of 44 Old 08-26-2011, 02:48 AM
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Using buckets to pour water into a 75 gallon = bad idea, look forward to many backaches doing that. The Aquen/Python water changer to faucet is the only way to do larger tanks. I use the Aquen one.
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post #9 of 44 Old 08-26-2011, 10:44 AM
Using the Python drain is the best way. Using RO water is the other best way. Keep a 55 gallon drum filled in the garage with RO water. When time comes for the water change, you can buy adaptors from Home Depot, some hose and a pump, attach your adaptors to the hose connect the pump to your Python and off you go.
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post #10 of 44 Old 08-26-2011, 12:20 PM
I have a 60g and I put the end of the gravel siphon into a standard garden hose that is run out to the front lawn. For the refill, I use two 2g mop buckets that I treat with Prime. I dump one as the other fills in the sink. Yes, that means 15 trips from the sink to the tank.

Just me, understanding that others have had success, but if I had chlorinated water (on a well and so I don't), I would not be comfortable overdosing with conditioner and then adding chlorinated water directly to the tank. I believe that there needs to be 5-15 minutes for the conditioner to neutralize the chlorine, heavy metals, etc.

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