cleaning a used tank

[automata]

I just bought a used acrylic tank which came with a filter among other things. Since it was used for other fish and I don't know the exact history, how should I go about cleaning the tank so that my fish is safe when I transfer him? Is there a way I can clean the filter properly or should I just buy a new one to be safe? There are also some plastic decorations that I may use and I've read that I should boil them? Sorry for all the questions, I had another fish die of dropsy recently and I really want to keep this guy safe!

[MSG]

• What size tank is this?

If you boil the plastic decorations you're probably going to melt it.

I would use hot water, vinegar or bleach solution.

Whichever you prefer.

I've had over 6 fish die of dropsy before I joined this forum.

I didn't clean anything in the tank.

[Kenny G]

The best thing for cleaning and disinfecting a tank and decorations is to use AQ Salt, distilled vinegar, and hot water.

[Alcemistnv]

As Kenny G said.

Just make sure you don't use too much vinegar. That might not end up well...

[Maura]

Originally Posted by Alcemistnv

As Kenny G said.

Just make sure you don't use too much vinegar. That might not end up well...

If you feel like you've accidentally used too much, rinse the tank thoroughly with hot water and leave the tank out in the sun for a day or so to let everything evaporate.