With the economic downturn we are all looking for savings to be made, but there are a couple of things to keep in mind. One is that looking for savings is a good move, the other is that cutting corners where it involves safety is not.
Below I list three items that you should get brand new, they usually go wrong quickly and have a high fail rate.
Why shouldn’t you get an aquarium heater second hand? With so many offers online for second hand items, the aquarium heater is one that you should get new. Many aquarium heaters fail, either they get stuck on the one position or they fail to heat up the water. Both will kill all your livestock.
Many fish keepers spend hundreds if not thousands on their tank, on substrate, lights, rocks, fish, etc, yet many people do not think twice about buying a heater second hand.
Aquarium water treatment or conditioners
Do you actually know what is inside a open bottle? Would you buy juice from a shop if the bottle was already open? Same with aquarium products. Don't bother with half used bottles. First many products have a use by date from the date they were open, and you do not know when they were open, secondly you do not know what else is mixed on it, and last the savings you may made will not matter if something goes wrong. Buy from a reputable shop and have peace of mind.
Many filters rubber rings have a usable life, same as it happens to your car, many items wear off after a while, and they need to be replaced. Would you like to come home and have half the tank water on the sitting room floor?