Heating a salt water aquarium – how safe is yours?

We marine aquarists are very keen (or certainly should be) to ensure that the environment in which we keep our reefs and/or fish is as good as it can be.

As well as maintaining high quality water etc, part of our concern should be the safety of the support equipment. We need to ensure that the equipment maintaining the environment does just that, and doesn’t endanger it.

So let’s look at heating. This is very simple nowadays, as there are various power (W) heater/thermostats available, and it is these items that are mostly used. All that is needed is to look up on the internet or in a book the power (W) requirement according to the net seawater content of our aquarium. Obtain a heater/thermostat in accordance with these recommendations and the job is done. However, is it really safe?

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