The tank is a 29 US gal, and its been setup for about 3-4 months.
It is filtered by a 30-60 topfin, and is also heated by a topfin, and its pretty hot out so that shouldn't matter.
There are guppies and platies in the tank along with the endlers, they show no signs of sickness including the male endlers.
I have not added anything new to the tank since 2 months
The water stats are all where they should be and i brought the amonia level down too a couple of weeks ago so its all good.
None of the fish show any signs of stress or sickness but my female endlers are all getting dropsy one by one. the females eat and swim alright. they have no other troubles but then they die all of a sudden.
I do a 25% once a week, and i siphion the substrate with a sump pump and its cleaned once a month, maybe less, i clean whenever I'm free and it looks dirty.