Lost the whole crew last night
Hi everyone, long time aqua-nut first time poster here.
Yesterday I finally added fish to my aquarium to cycle it. They all died by morning, and I've never had this before.
5x black terraces
1x Anubias plant (not sure which)
30 gal, eco complete substrate, sunsun 304b filter, 24/7 finnex led light, heater, air stone, powerhead.
I also have a pressurized co2 setup but its not active.
I have DIY a foam/quickcrete background.
Measured water parameters this morning;
Nitrate 10ish ppm
General hardness 180
The waters been circulating for a day or so with "prime" added, and the parameters, minus general harness, seem to be ok.
What happened... can anyone help, or give advice?
Planning to do large 30-40% water change and add goldfish to cycle it. Good/bad idea?