I've just acquired a 30 gallon tank that I'm using for a QT tank for my discus. They haven't had it running in a long time. I'm wondering what's the best way to clean it? Just soap and water? Bleach? What about the filter? How do I clean that? Also, do I clean the bio wheel or buy another one? The only thing I have to get is a lid. They used a screen. I've never known anyone to use a screen. I would think all the noise would bother the fish?
If you are talking about disinfecting the tank, filter, etc., BLEACH! I usually dump a cup of bleach in fill with water, take the filter, etc. apart and toss it in and let it set for a few hours, making sure to wipe down all the outside and get the disinfecting water into all the nooks and crannies. When the is done, rinse with white vinegar, or a solution made with a cup of vinegar and a cup of water--this will neutralize the bleach. Of course, be careful with non-submersible heaters and such and made sure you do not damage them with the solutions--i.e., don't let the solutions get into the circuitry--with submersible heaters there is no worry. Rinse everything well with clear water when done.
If I am saving the gravel, I have a cheap little propane stove with uses a cylinder of gas and I boil the gravel in a big pot on it. Non-porus gravel can also be bleached and neutralized in the vinegar solution.
For water deposits, you will need vinegar, limeaway (or another such product) or muratic acid can be used--neutralize vinegar with baking soda and do a final rinse in clear water.
A razor blade can carefully be used to move any heavy deposits of mineral deposits, before, during and after all of this as is suitable--just take care not to scratch the glass--and of course, use NO razor blade on a plastic tank! Indeed, even a green pad scrubber will scratch the plastic!
Regards,
JS