I already have the Synodontis, with enough hiding spots, it seems fine.
I'm looking to know how this stock would do in a 140g, with an FX5 filter. How meny water changes you guys think i would need to do.
I change 40 a week. I do test. I was just afraid that a large amount of plecos, like this would make for like water changes every day.At least 25% a week, but get a test kit, maybe you can do bigger water changes fewer times. But it all depends on what the tests say, but still once a week I think is a pretty fair deal. That way you get to remove all the leftovers and poop, and most fish behave and feel better with regular and consistent water changes.
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What do you have for substrate?
Sand or gravel?
Pleco's do waste alot, so i'd continue with 40 a week, and see how that goes initially, then adjust accordingly.
A single bristlenose would poop to shreds my 5 gallon in a single day, so i wish you good luck.