Although one bag of shock does treat usually 10,00 gallons, that is assuming a clear pool to start with. Since you had an algae infestation, more shock will be required. A simple rule of thumb is when treating problem water to double or even triple shock the pool. Simply put, there wasn't enough shock there to finish the job. Test your water for chorine. Most shocks are chlorine based. If your chlorine is low or zero, it will confirm the need for more shock.
The bigger the cartridge the better the job it does the size you use would depend on the load you expect it to have to handle. speak wit a local pool professional for the best answer. The smaller the cartridge the more often you have to clean it.
u can use a aqueon 55 gallon filter
I think you should go for a cartridge filter (Pentair 320 sq ft - we can supply for $600 incl frt). Cartridge filters are much better than they used to be, and are far, far more coinvenient than sand. Suitable sand filter would be approx 100 sq ft (and same cost as 320 sq ft cartridge).
For a 33,000-gallon pool, you'll typically want a pool filter with a flow rate of at least 1,000 to 1,500 gallons per hour (GPH) for effective filtration. This translates to a filter size of around 24 to 30 inches in diameter for sand filters, or a cartridge filter rated for at least 200 square feet. It's important to choose a filter that can handle the pool's volume efficiently while allowing for regular maintenance and cleaning cycles. Always consult the manufacturer's specifications for the best fit for your specific pool setup.
yes you can it will be fine. i have experience :) haha
The time it takes to filter one gallon of water depends on the type of filtration system used. A typical gravity water filter can take around 30 minutes to filter one gallon of water, while a faucet-mounted filter can do so in a few minutes. High-capacity filters may be capable of filtering one gallon in under a minute.
For a few days yes.
Clean filter
I would highly recommend it, yes
1 gallon, with a filter change.
You may be able to use a very small internal filter with a 2.5 gallon tank. You can check with your local fish/pet store and they may be able to show you ones that would work for your tank
Air bubbles will do nothing. What is needed is a filter.