Safe to add fish?

[LordNecro]

So my cycle recently finished after 33 days. Ammonia and nitrite were 0 after a 40% water change yesterday. Did another 40% water change this morning to try and reduce nitrate. Nitrate is currently 20. Can I add a pair of fish yet? Or should I do another water change to remove nitrate? My tank is a 20 gallon nano with about 15lbs of caribsea liferock and 30lbs of caribsea live sand.

 

[Ron Reefman]

If it was a really big tank I'd say it's iffy but I'd try it. But given it's a 20g tank, another water change should be fairly easy and I'd recommend doing it just to be on the safe side.

 

[Raege]

I think you will be good to go. Nitrates more issue with corals not so much with fish just for a good acclimation and do your scheduled water changes for nitrates .

Edit was your ammonia and nitrites zero before water change? If not cycle may not be completed regardless of WC should be no ammonia

 

[LordNecro]

If it was a really big tank I'd say it's iffy but I'd try it. But given it's a 20g tank, another water change should be fairly easy and I'd recommend doing it just to be on the safe side.

Thanks. Only reason I didn't do a large like 90% water change is my faucet is slow so it takes me like 3 hours to make 5 gallons. Currently making more rodi water so ill do another like 50% water change

 

[LordNecro]

I think you will be good to go. Nitrates more issue with corals not so much with fish just for a good acclimation and do your scheduled water changes for nitrates .

Thanks. Yup planning to do 10%-20% water changes every week

 

[Ron Reefman]

Good choice. I keep forgetting what it was like when making RO/DI was a slow process. My current system makes over 1200gpd! ;Wideyed

 

[Raege]

Thanks. Yup planning to do 10%-20% water changes every week

I edited my post before WC you had no ammonia and nitrites? If not cycle may not be done

 

[LordNecro]

I think you will be good to go. Nitrates more issue with corals not so much with fish just for a good acclimation and do your scheduled water changes for nitrates .

Edit was your ammonia and nitrites zero before water change? If not cycle may not be completed regardless of WC should be no ammonia

Yeah ammonia and nitrite were zero before WC

 

[LordNecro]

Good choice. I keep forgetting what it was like when making RO/DI was a slow process. My current system makes over 1200gpd! ;Wideyed

Wow my system is 75GPD and I'm at around 40 psi :/

 

[Ron Reefman]

I had a friend who sold this system to me for $150. It came from a coffee shop that was going out of business. The old 75gpd hangs on the wall as a backup. The 2 stainless tubes are 24' long RO membranes and the pump make 120psi. The 40g tank next to it is RO/DI storage. I use a 180 well cistern for the reject water and then use it to do laundry. BTW, the wife asked me to do the laundry if I was going to have to pump reject water from the cistern to the washing machine. A small price to pay.