If your external cannister uses a spraybar or output pipe that can create visible surface flow then I would not think aeration would add much.
Most of our members have not been happy with the various bottled products that claim to be related to establishing a nitrogen cycle and creating a working biofilter.
By contrast, we have hundreds of engaged, happy beginners who have been through our fishless cycling process and learned hands-on about biofilters while also learning about good water changing techniques, good filter maintenance and how to prepare a good stocking plan. All those things can happen while the members are helping you monitor a real fishless cycle, done with a good testing kit and simple household ammonia.
~~waterdrop~~
It does seem to be taking some time I must say so I decided to test it once every few days. Household ammonia would have been the best I reckon in price I'm currently spending 6.50 for 120 mill of waterlife and onto the second bottle now. Least there is some nitrite I guess

l as for water changes I was ba king on around 3 a week? I have been reading up for weeks on how to keep discus fish and have an aim of keeping these in months to come.
Water change wise I was thinking of buying 2 50L bins one for the water in and one for water out? I bought an extra heater to heat the water ready to be added to the tank so there would be little difference in the water temp being added? Does anyone else have any other ideas on easy ways of water changing?
Im a fan of air pumps and I recommend the Tetratec APS300.Its cheap and quiet and powerful.
Do you use an air curtain with this? Which one is best for it? Do you just store the pump in a cabinet and run the cubing into the tank? I have read reviews on the APS 400 and they all said they worked well for 1 month then they needed to replace parts such as the diaphragm? Have you had any problems on the APS 300?
Cheers