Article reprinted from
Beginners Guide to the Water Change
Category : Beginners Articles
Published by EagleC on 22/07/2007
This article is to give new keepers a guide on how to perform a water change on a coldwater or tropical tank in the most effective, least stressful manner.
Every week or two you need to change between 10% and 25% of the water in your tank. How much and how often depends on test results and isn't covered in this article. This article is to give new keepers a guide on how to perform a water change in the most effective, least stressful manner. Least stressful for both the fish and the keeper that is.

Before you start you'll need to make sure you have some basic equipment. First of all you'll need water containers of enough capacity to hold all the water you are taking out of your tank and all the water you will be replacing it with.
You'll need some dechlorinator that removes chlorine, chloramines and dangerous heavy metals from the tap water.
Finally, you'll need a Gravel Vaccum.

All of this equipment should be available from your local fish store. For water containers though you may find that a DIY or camping store is cheaper. Make sure the container is 'food grade' though.

Proper Preparation
1. First prepare the clean water that needs to go into the tank at the end. To do this fill your 'clean' container with water from the cold tap and bring it up to the same temperature as the tank by either using boiled water or by adding a spare tank heater.

2. Add the dechlorinator to the fresh water, stir it in and leave it to stand while you prepare the area (see step 3). If you plan to add medications, plant food, salts or other additives to the tank this should be added to the new water now.

3. You're going to be walking around with heavy containers full of water. 1 liter of water weighs 1kg so make sure they're not too heavy for you if necessary use multiple smaller containers. Also lay some towels down around the tank as its guaranteed there will be some drips and splashes. Leave the fresh water out the way for now but make sure all the empty containers that you will need are to hand.

4. If you are going to have to walk across a tiled or laminated surface consider investing in a rubber anti-slip mat. Put some slippers or shoes on to protect your feet and keep them dry.

Out with the old
Note: Before you remove the old water, this is the perfect time you test your water for ammonia, nitrites, nitrate and PH.

5. Use a gravel vacuum to syphon water from the gravel of your tank. At the same time this collects all the solid waste that collects at the bottom. Syphon the water into the spare buckets or containers that you prepared earlier. For gravel just dig the end of the gravel vac in about 1cm and watch the dirt get sucked up then move the vac over a little and repeat. For sand its a little trickier, wave the nozzle over the sand creating a small underwater dust devil. The dense sand will generally separate from the relatively light solid wastes.

6. Check your dirty water containers carefully to ensure that you haven't accidentally syphoned up a fish provided they're all clear you can empty them out in the garden - tank water is great plant food.

In with the new
7. Pour the new water in very slowly so as not to disturb, frighten or shock the fish or the gravel and decor. You might have to decant the water into smaller containers so that its easier to lift up to the tank and pour.

That's all there is to it.
All articles are the copyright of their respective authors