11-10-2009, 01:16 PM
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Craigslist is an awesome place to start. Another option is to find some British aquarium forums-- they will have classifieds for areas all over Britain. A good one is fishforums dot net. A British forum will also become a good resource as far as recommendations for medications, equipment, etc.
You will need something at least 2 USG or larger. As far as heating goes, you are looking at 5 watts per every US gallon, so a 5g tank would need a 25w heater, a 10g would need a 50w heater and so forth.
To decide on tank size, you will need to think about how often you want to be cleaning it. This will depend on whether you choose to 'cycle' your tank, ie establish a nitrogen cycle to detoxify waste products. Here is a rough rundown:
1.5g: 25% 3 times weekly
2g: 25% twice weekly
5g: 25% once a week
10g: 10% once a week or 25% once every 2 weeks.
1.5g: 100% 3 times weekly
2g: 100% twice a week
5g: 100% once a week
10g: 100% every 10 days.
The trend you will notice is that the bigger the tank, the less you need to clean it. Also, water parameters such as temperature, pH, etc will remain more stable in largr volumes of water. It is up to you to find the balance between how much space you want the tank to take up and how often you are prepared to clean it.