Quick overview. Planted 125L tank with a good sized external filter (Fluval 307). Injected CO2. Reasonably lean dosing. Water params ~ 50/50 RO/Tapwater (hardwater); GH 12, KH 6,NH3 0, NO2 0, NO3 ~20ppm, PO4 ~0.5ppm. PH between 6.8-7.8 depending on time of day (changes with CO2 levels). Livestock - 8x Dwarf Pencilfish, 1x Pleco, 3x Corey (small), 2x guppys, 2x black pahntom tetras, 12x Lambchop Rasbora, 10x Chilli Rasbora, ~40 cherry shrimp, various snails. Sounds like quite a lot but the rasboras are all tiny so have very little bio-load.
Generally the tank seems quite healthy, I change 30-40L weekly, clean eheim pre-filter with water changes and the canister filter every 1-2 months.
I've noticed a few of my pencilfish have a bit of a bloated stomach (probably 4/8). I'd presumed these were the females with some eggs. However, one in particular has become very bloated to the point that it looks deformed. I've also noticed that the female guppy looks pregnant even when she's given birth.
Having read a little about bloating I first thought dropsy but then they've been like this for weeks and I read that's often quite quickly fatal? The other options are worms, some other parasites, eggbound or some sort of genetic issue.
I'm attaching a few photos, sorry if they aren't clear but the fish don't stay still for long! Any ideas?
Generally the tank seems quite healthy, I change 30-40L weekly, clean eheim pre-filter with water changes and the canister filter every 1-2 months.
I've noticed a few of my pencilfish have a bit of a bloated stomach (probably 4/8). I'd presumed these were the females with some eggs. However, one in particular has become very bloated to the point that it looks deformed. I've also noticed that the female guppy looks pregnant even when she's given birth.
Having read a little about bloating I first thought dropsy but then they've been like this for weeks and I read that's often quite quickly fatal? The other options are worms, some other parasites, eggbound or some sort of genetic issue.
I'm attaching a few photos, sorry if they aren't clear but the fish don't stay still for long! Any ideas?