Originally Posted by anastasisariel
I would strongly recommend against using a Spongefilter on a 40 gallon. A 20? Well maybe two good sized ones. On the 40 I would get a canister.. if you want to try some DYI there are canisters that can be built and I'm currently enjoying a trickle filter system inhereted from a friend which can be built as well. Honestly, buying a canister for the 40 is probably the quickest and easiest way though.
So Sponge filters for smaller tanks then... I wouldn't mind a DYI canister filter. I"m not familar with a trickle filter system though, I would have to research that one. Is it like an overflow with a sump system?
Originally Posted by Diana
Sponge filters are great for fry. A lot of microorganisms will grow on them and the fry can eat these things.
But fry are not strong swimmers, so I would use only air, not a PH to run a sponge filter in a breeding or grow out tank.
If the tank needs more cleaning than one sponge is doing, then add more sponge filters, do not increase the water flow through a single sponge. A large diameter sponge will have a more gentle water flow at its surface compared to a smaller sponge.
If the tank has fine substrate then the sponge filter can plug up very fast, clogged by sand and finer materials. Keep the sponge filter high enough that this cannot happen. If you are raising the fry in bare bottom tanks, or with a thin layer of coarse gravel, then there are no worries about the sponge picking up sand or silt.
Thanks for the tips. When I breed fish I think I'm definitely going to be using a sponge filter.
Originally Posted by tattooedfool83
I actually just replaced my hob with prefilter on another 10 gallon with a dual sponge filter as the pre filter kept getting clogged and slowing flow. So far so good on this tank, only has tiger endlerS, Pygmy cories and cherry and chocolate shrimpso low bioloads, but sponge filters are awesome once established I usually run them in my heavily stocked tanks to seed them and then can place them in a new tank whenever
What do you mean by seed them? Placing the filter in an established tank to quickly develop bacteria for a new tank?
I'm guessing this would speed up the cycle time for a new tank, if you plan on using a sponge filter.
Originally Posted by DogFish
If a breeding tank/fry grow out tank needs more than an air run sponge....You are not doing enough water changes/cleaning. When I was seriously breeding Angelfish* & Africans I use mostly 20L tanks. They were bare bottom, sponge & a heater. Daily syphoning of waste/uneaten food, typically daily 10% water changes while cleaning. Daily cleaning allows for more feedings a day and faster growth.
Thanks for the comment. Why does daily cleaning allow for more feedings?
I'm just wondering because I'm wanting to start breeding fish myself.
The plan is to get 4 40B tanks, put them on 2 stands (2 stacked each stand). I initially was only wanting to use these tanks for growing plants, but I figured I could try to breed certain fish in each tank. After reading all these posts, I can see maybe the sponge filters are not good for a 40B tank.
Let me know if this sounds like a decent idea: Maybe I can put in seporators in each tank for keeping the males and females apart for different species. and then have a few 10G tanks for the actual breeding/fry growing out. So I could pick a male and female, put them in the 10G and let them get it on, then put the adults back in there respective tank and side.
The idea behind this is to get the most out of each tank as far as plant growth and breeding because I'm interested in both.
I was thinking sponge filters would be good for breeding, and I could use them in the 40B tanks because they are cheaper. Maybe that isn't really the best method though.
My next idea would be to use an overflow and sump system for each tank. So 1 filter essentially for all 4 tanks and also one heater for all tanks. My only concern is loss of co2 with overflows...
Thanks for all the comments. They are all very helpful!