I am new to aquaponics and live in cold Melbourne. I have setup a 1500 litre tank with growbed above with mixture of herbs and veggies 21 days ago. Put 20 x 20cm rainbow trout in 18 days ago (smallest the suppliers have down south this time of year)
Have been only lightly feeding the fish every 3 days, added bottled bacteria to growbeds from an aquarium at commencement to speed things up as water temp only 12 degrees C.
Ammonia showed up after 4 days and peaked at 4.00ppm before I did a 30% water change.
Ammonia has hovered around 3.5ppm for past few days and Nitrites showed up 5 days ago.
Took a reading of Nitrites this morning of 2.00ppm so did another 30% water change and are considering adding pool salts. Nitrates are showing 5.00ppm so looks like Nitrospira are coming to the party.
Concerned about the salts being absorbed by veggies. Some sites say to only do water change and add salt if Nitrites reach 10ppm, others say do it if goes over 1.00ppm?
Do I just wait and see since I am getting Nitrate readings now or should I be taking action now?
Fish seem to be fine, not hovering on surface, not being skittish, not just sitting on the bottom. Get very active when I approach and they "think" they are going to get a feed, poor ******s!