It’s finally happening, but it’s actually happening

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I’m not sure on the catfish because of the spines, but I don’t think they would be able to because I would put a layer of gravel or something like that on the bottom.

I would like some sunfish, but some albino channels would be cool. Could I split the difference and go 2 pumpkinseed, 4-5 koi, and 2 channel cats?
Never know until u try ? Prob more than fine with that stock list. I wouldn’t worry about the catfish spines either. As they grow they actually get duller. Its the 6-12” u have to worry about and at that size i doubt they could really even get through 45mil epdm. Ive kept liner tanks and ponds for yrs with all sorts of cat species… only problems i ever had were with pacu and most esp. distichodus sexfasciatus… no bueno lol… The rock work will be more worry some for holes. Use a good underlayment
 
I've never kept them together but wouldn't channel catfish eat sunfish? That sounds to me like the coldwater equivalent of having a red tail catfish with an oscar (which is one of the fish they tend to eat often).
 
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Not the bottle brush!!!

Just go with one singular gigantic Murray cod. It would love it.
Koi are a must - it’s my dads money that’s paying for this pond! It’s his backyard! I’m just creating it lol. As long as he gets a couple koi, he’ll be happy.
I've never kept them together but wouldn't channel catfish eat sunfish? That sounds to me like the coldwater equivalent of having a red tail catfish with an oscar (which is one of the fish they tend to eat often).
Sunfish grow a lot faster than catfish, and I think if I got a large species like Shellcracker or Bluegill it could work… though you bring up a good point.
 
I've never kept them together but wouldn't channel catfish eat sunfish? That sounds to me like the coldwater equivalent of having a red tail catfish with an oscar (which is one of the fish they tend to eat often).
Pretty unlikely… channels grow very slow IME… even a wild adult will not often consume a large gill/sunnie… they are more so scavengers. Used to fish for them with 1-2” gill chunks, soft oily creek chubs or 6” suckers. Full size/live gills r for flatties lol… channels mouths are pretty small. Y there often kept with koi and sold by many koi suppliers for such. They just cant take down large meals like that. Sure a 10-15yr old channel may feed on juvi/sub adult gills. Adult gills are tall bodied tho and a channel would have trouble gettin em down into their gullet. RTC vs oscar isnt a good comparison. Even a 30”+ channels mouth is much smaller than say a 24” RTC that could take down a gill/oscar. 30” channel would also be 15yrs old range. I kept one for 13 yrs, it was a mere 26”… the gills would reach adult size long before a channel was ever over 18-20” even.
 
Koi are a must - it’s my dads money that’s paying for this pond! It’s his backyard! I’m just creating it lol. As long as he gets a couple koi, he’ll be happy.
Sunfish grow a lot faster than catfish, and I think if I got a large species like Shellcracker or Bluegill it could work… though you bring up a good point.
I wonder how koi would do in a pond with Murray cod, considering how the common carp is thought to have an impact on the decline of them in the Murray Darling Basin.
 
Koi are a must - it’s my dads money that’s paying for this pond! It’s his backyard! I’m just creating it lol. As long as he gets a couple koi, he’ll be happy.
Sunfish grow a lot faster than catfish, and I think if I got a large species like Shellcracker or Bluegill it could work… though you bring up a good point.
i cant speak for channel but i know for sure that an adult bullhead will leave everything above 12cm alone. They are always hungry but wont even try a fast fish like a cichlid and def prefer pea's or shrimp over a live fish. as said before they really scavenge and dont really hunt. Mine was a friendly giant atleast. I even was able to keep 8cm small bichirs with him while he was around 30cm
 
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