What is your specific use case for the pump? Are you simply using it for water changes? There are a couple different ways you could go.
To stick with using hoses like you are, you could use a diaphragm RV style pump like
THIS . They are durable, long lasting, and self priming. The disadvantage is they don't play well with debris, so you need to use the filter screens they come with but those can get clogged quickly.
You could also go with something like
THIS. You just attach an output hose and place the pump in your tank. It drains the tank in nothing flat. I have 2 and use them exclusively for tank draining on water change day. I use the RV diaphragm pump mounted in the basement, connected to the RO water storage bin for refilling the tank.