^^^^^^^^
That looks like normal poop to me.
It can't hurt to treat your puffer, whether he's healthy or not. But if you're going to treat, then do it with every meal, for 3-5 days. You can keep the shrimp in the medicated water in the fridge for about 3 days, before it starts going bad & just break off small pieces for him to eat.
That looks like normal poop to me.
It can't hurt to treat your puffer, whether he's healthy or not. But if you're going to treat, then do it with every meal, for 3-5 days. You can keep the shrimp in the medicated water in the fridge for about 3 days, before it starts going bad & just break off small pieces for him to eat.