The Puffer Forum

Hi Everybody

I've been struggling with one of my GSPs for the last 2 and a half months. He is part of my original group of 5 GSPs I got as a present almost 2 years ago. I lost one of those within a week because it got stuck in some decor.
Anyway, I moved 3 months ago but it started before that, he has never been a great eater, smaller and a slower grower, he doesn't eat until he is round like the others. He's only grown about 2cm in almost two years, while the others have basically doubled in size. My largest is around 9cm and hes about 4cm.
I have a total of 7 GSPs now with the newest additions coming in about a month and a half ago, I have never had any aggression issues ,not so much as a nipped fin between them, bunch of fatties. So this baby of mine, is still eating everyday and looks happy and busy. But is slowly becoming skinnier. I moved him to a separate container that floats in the tank around a month ago to make sure about how much he eats. I give medicated food at least twice a week to be sure of parasites, they also get live snails that I breed myself every second day, plus frozen food. They don't get food twice a week.
This poor baby is so skinny his spine has started bending in an S shape.
I don't know what to do anymore, all the others are fine!
Sorry for the long post.
Any help will be appreciated

Sorry just some additional info, they are in a custom 4ft, only the 7 puffers with "dry rock" you use in reef tanks as well as similar gravel since I'm slowly turning it marine.

SG is 1.018
Temp 26C
All other parameters are normal
I do a 25% wc every 2nd week and use red sea salt and RO water.
They are fed bloodworms, live snails, mussles, krill super ba, shrimp, polycheates, and hake.

I'd QT that fellow & try a different med. There are many different IP species that can live in them for a very long time. ONLY feed medicated food for 5 days, then meaty foods soaked in vitamins for 2 days, then try a different IP med for another 5.

+1 to pp recomendation. Make sure you keep the krill as an infrequent treat. Qt'ing the affected gsp as PP said should have him have in healthy quickly if following the regimen she mentioned.

Ok I will QT him. Why should I only feed krill as a treat? I've been using prazi but got some new meds today to try.

Krill has been linked to lockjaw. Normally when it is the only thing fed but always best to be safe.

You also need to feed your fish a varied diet. Often, krill keeps them addicted to it & they won't eat other, healthier choices. Try live earthworms. You can inject them with the meds.