My name is Sarah and I'm new here and pretty new to fish keeping. I did have a 20 gallon when I was younger, but I only knew a little bit.
I don't want to be too wordy, but hope this is the right information you will need.
Aquarium- 75 gallon (long).
Nitrate - Reading at 0
Temperature 84f (Slowly putting it down and is 82f today).
tank has been cycled.
Sand for bottom
stones that make caves.
4 hatchets, 4 female guppies (1 out of five died), 4 male guppies ( All 4 died) 1 clown loach (4 died- 1 accidental death), 4 silver hatchets ( 4 alive and well). Guppy Fry (21 in a one gallon, approx 6 in the 75 gallon doing well.).
When I added the female guppies I noticed my clown had a small white spot. My bf and I treated them straight away for ich, just in case using Tetra Ick Guard at half dosage. We raised the temperature to 84f (not that high) and added a smaller air pump to the tank in addition to the filter.
1) (Is the filter not good enough? Is the bubbles adding air from that or do I need a big air pump?
At first they all looked fine, three days or so later each of our fish started dropping dead. But not all at once. Within two weeks, one at a time...a day.. pretty much, or so it feels like. One accident- The first clown got stuck inside the air pump.
We are slowly decreasing temperature to see if that will help.
The female guppy just dropped dead, no signs at all. Swimming fine etc..
The males all died one after the other- I saw fin rips. I wasn't sure if this was fin rot or the females killing them. I'm wondering if the later because the females that are left seem happy.
Next the clowns died one day apart, with one left now.
No signs of ich or any other parasite. They look bright , colourful, and fine. Sadly, the one with a giant black spot instead of a stripe died an hour ago..I thought that was pretty cool about the spot.
We stopped medicating...we did water changes when medicating (Before a new dosage was added 25% water change) Last night we stopped meds and did 50%. The hatchets, the females left, and the fry are all fine.
Oh yeah..today our pleco died. He is the only one who looked like he was attacked. But I saw him slower last night and guppies trying to pick at him once or twice.. before he fled..so maybe they just picked him off a bit after death..
EDITED TO ADD: our clown loach we took out seems to have skin missing. Should I treat for something else? Will that stress the fish out more? I'm soo confused.
Any idea what I should do?