Tank size:40 liters(15 liters per puffer) Temperament:Territorial/aggressive Diet Carnivore (Full) Temperature 77-79 °F (25-26 °C) pH 7-7.8 Maximum size 1″ (2.5 cm) -------------------------------------------Diet: Snails (juvenile stage), blood worms, earthworms and mosquito larvae. They don't eat flakes or pellets. Tank setup: Heavily Planted, lots of hiding spaces. Highly discouraged other tank mates. Filtration: Sponge filters are recommended for there low water flow, but you need to over filter. Go for around 5-8 x tank size in liters/hour. They need low flow, they don't like fast flowing water. Pea Puffer are cute and very inquisitive. So they need a good amount of tank space to explore and hunt in. Snails are great to use for food, they will bread and mice around the tank which is natural and a sustainable food source for a pea puffer. Normally the snails won't make it to adult hood, because the pea puffer would of eaten them. There are debates on if a pea puffer will attack neocardina shrimp. When fully grown a pea puffer will deffenitly see baby shrimp as a food source but in general the adult shrimp are not bothered. This is based on my experience so fair with shrimp and pea Puffers, so I can be different for others. The tank you wish to keep a pea puffer in has to be well maintained. They do not survive for more then a few days if there are traces of ammonia and nitrates. Which is why it is best to have a heavily planted tank to help control the toxins. A good way to ensure your puffer is happy, is to use live food and create a natural habitat for them. They come from slow to no moving water sources and so do not like high flow rates from filter outputs. So I recommend a sponge filter. You will want to over filter with them as you just can not have any build up of toxins in the tank. Pea Puffer are fin nippers and will nip at fins of other puffers, and long fin fish. Which is why they are best to be kept on there own. Tips: Bigger the tank the easier it is to keep water parameters stable. Feed 2-4 times a day in very small amounts, only feed 6 days out of 7. Live food encourages them to hunt. Water changes must be done weekly and a strict maintenance schedule should be created and stuck to.