Less Messy Feeder Species?

Is there a less messy, prolific feeder size fish than Poecilia (guppy family)?

I have about twelve guppies, endlers and swordtails in a 30 gallon planted, rocks and substrate, with a Whisper 40 filter and an Aquaclear 50 filter running, but the water quality goes bad so quickly bc of the large bioload. I only feed a pinch once a day, but they're eating algae, fry and plant pieces too.

None of my other tanks get bad so quickly.

I don't know about mosquito fish bc they're also messy, and are even more cannibalistic, so I'm not sure how practical they are for feeders.

For anyone offended by this, I only feed out what can be swallowed whole, not torn apart. Mostly the endless babies.

 

Feeder ghost shrimp?

 

What are you trying to feed? If it is small, I'd do worms, shrimp, or daphnia.

 

Depending on how many I would say the reason for bad water quality would be the swordtails. Guppies have a lower bio load than swordtails and the endlers would have the smallest of the 3.

 

Now that I think about it, if you're only feeding the baby fish that must mean that whatever fish you're feeding is pretty small. You could get away with only feeding frozen food (IMO). What fish are you feeding?

 

Right now cichlids, but soon will be piranhas and others. Won't be able to just feed babies to those.