One thing you may want to consider.
If you only have a few tiny tanks... say...totaling @ 50 gallons or so... and you don't have intentions to add lots more larger ones in the near future, there may be no need for a Python. But...
If you plan on adding a couple hundred more gallons soon, then a Python might be a good investment.
For about 20 years straight, I kept at least 20 tanks running of over 1500 -2000 gallons, and changed a couple hundred gallons every other day, in that case, a Python or an automated water change routine was essential.