I can do 50% weekly at least maybe even 50% biweekly. What is a reasonable time line for introducing fish?DarkOne said:I have 15 plecos, 3 which are 6-7" now and will grow to 10-12" in a 40g breeder. I do 5g w/c daily (mostly to siphon out the poop) and 50% at least weekly. I also have a QuietFlow 50, sponge filter and 2 moving bed filters. Keeping an overstocked tank is doable but it takes dedication and LOTS of maintenance. You also need to introduce fish slowly and ramp up the amount of food slowly so the BB can catch up.
I've been thru a few different brands of air pumps and for 1-2 tanks, I highly recommend the Active Aqua. They have models from 1 to 8 ports built into the pump and a dial to control the amount of air. I have a 2 port pump and it's currently running 2 tanks with 4 filters (3 sponge, 1 box) and a breeder box that takes minimal air. They're very competitively priced and relatively quiet.
Danner was another highly recommended pump but it's not as powerful. Whisper and Fluval pumps are good for about a year if you're lucky.
If you need to run 3-6 tanks, the Alita AL-6 is amazing. I'm running 8 filters in 5 tanks with this pump and it's dead quiet. 3 of those filters are moving bed filters that need a lot of air to run.