Problem is, turtles lived in it for quite some time. It has a lot of built up calcium and I was wondering, A) the best way to go about cleaning this
Vinegar. Really. The cheapest you can find will do.
B) can I use bleach, soap or chlorox?? Also, after the initial cleaning, I'm going out to buy the tank's necessities and what not, and so far my list is ...
Best not to, unless you have to. We sometimes use a very mild solution of pure bleach for disinfecting. Nothing with fragrances and suchlike should ever be used.
Air stone, tubing, air pump (already purchased)
Good to have, but most of us don't use these often.
Not so for some people! Glad you got one already, what type?
Water dechlorinator/stabilizer/whatever
Dechlorinator, there are other products too. Use a dechlorinator which removes chlorine, chloramine and heavy metals.
Sand or gravel? Some fish can only be kept with sand (we use play sand often as it is much cheaper than aquarium sand).
Decor and plants can be added after the tank is cycled, if you plan to do fish-less cycling, that is.. which we highly recommend! Generally, a piece of bogwood and some live plants are the best options
Are hoods necessary? I'd like to have a hood+light combo, but I'm trying hard to stay under ~200 USD.
Hood only for some fish, but a light is a must and lights for open-topped tanks tend to be more expensive. Aim for 1 (or just over) watt of light per US gallon. T8s are fine if you're not going to go mental with high-tech planted set-up.
Also, you should have:
* Liquid test kit for ammonia, nitrite, nitrate and pH, API Freshwater Master Test Kit is highly recommended. Test strips are inaccurate, so almost useless.
* Source of pure household ammonia (if you plan to fish-less cycle, which you should do)
A 55 gallon is basically the perfect size tank to start with, and I wish I had been able to have that as my first one
![good :good: :good:](/images/smilies/ipb/good.gif)