Blue and green phantom plecos together in a 75

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I have a small pack of clown loaches, a few small flagtails, and an angel. Soon I will have a baby dat going in there.

I am running an ac110- with a 100g rated sponge filter as a prefilter. And a fluval 305 canister. I do 30-40%wc weekly and never have any issues with water quality.

All the fish look happy, healthy and bright vibrant colours.
 
Adding my two cents here. I have a 6 inch L128 (Blue Phantom), a 5 inch L128, a 3 inch green phantom and a 3 inch vampire pleco in the same tank. No issues at all, HOWEVER I purposefully created caves for each fish. It's pretty cool to see how they all stake out their own spots with no issues. But without the caves they'd be very stressed and/or would probably fight with each other.
 
You'll be fine.
There should not be any issues at all. I've got a lot of plecos in a 150g. Various species, sizes and temperaments. For the most part I have never had any real problem. L128 and L200 (not high fin), if not the same species, are extremely closely related and pretty mellow.
As long as you've got a lot of wood, rocks, and filtration they'll be happy. You can have more than one of each and should still be fine.
 
I've kept all 3 L200 species (assuming the two Hemiancistrus are different species, as mentioned they could well be different colors of the same fish). I've had them with other plecos and sometimes a couple of L200s in the same tank. For me they were peaceful, but their tanks had multiple driftwood, rocks, etc.

I know it's very common to say plecos produce a lot of waste, but ime some do, some don't. Ime L200s aren't bad at all-- maybe it depends on what you feed them, a lot of so called pleco wafers have junk ingredients.
 
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