Apologies if this is in the wrong place or has already been answered elsewhere, I’m a total newb and still figuring out how everything works here. I did a decent search and couldn’t find the kind of details and advice I’m after. The article on Canister Filters was fantastic, but there are so many variables it left me feeling uncertain . So any advice / information would be greatly appreciated!
I’ve just come across the 10 x volume in litres/gallons per hour rule, and realised I am drastically under filtered!
I have a 450 litre (118 gallon) tank and an Eheim Classic 2217 Canister filter (1000 litres or 264 gallons per hour).
I understand that canisters have lots of space for media (large surface area for beneficial bacteria!) and therefore some suggest that for canisters 4 – 6 x volume in litres/gallons per hour is ok. But even according to these much lower guidelines I am way under filtered, which is a worry.
My cycle is stable with my current setup, Ammonia and Nitrite are always zero, and my nitrate level was always around 10ppm when I was doing 10% weekly water changes. Now that I am doing 50% weekly water changes my Nitrate is always < 5ppm, closer to 1 than 5.
Is this because my fish are quite small and there are only 4 of them? Will the filter get less effective as they get bigger? Do I need to add more filtration asap or do these parameters suggest the current set up is managing the current bioload?
I’m looking in to getting at least 1 additional canister in the near future, but I’m also worried about the strong current that would create in the tank. Even with my current set up, I have filter floss over half of my spray bar because otherwise it really whooshes the water around (this is a little unsightly, if anyone has a prettier solution I would love to hear about it!). To get 4x tank volume in litres per hour I would need at least 4 canister filters of this model. The current in the tank would be so strong!
Any suggestions of the best way to proceed, and what to do while I make arrangements for a more optimal filtration system? (aside from regular water tests and changes)
I would love to hear about your successful filtration systems, to what extent they comply with ‘the rules’, particularly from those experienced goldfish keepers with big, happy and healthy goldfish!
I really want to provide my fish with optimal conditions so that they can thrive, so any advice and info is more than welcome!