Growth rates... :(

[Patrick_L]

Need some help or advice about growth rates.

I have had my AP system running for about 75 days now (the system fully cycled about 40 days ago).

It seems some plants are growing ok and other are just stalled.

I have had a small lettuce with 4 leaves that has not grown at all in the last 3 weeks but its still alive.

I’m using about 2 dozen goldfish and my water readings are as follows

PH: 6.7
Ammonia 0
Nitrite 0
Nitrate 5

I was thinking maybe the plants where not getting enough light so about 3 weeks ago I added a few grow lamps (this system is in a home made greenhouse)

Any advice or help would be greatly appreciated.

Pat

[Castaway]

Some plants just do that Pat. Can't fight nature. They might be in fact putting down their roots or its not the right season for them to grow. I've planted some that just went straight to seed. Thats life. Try again a month later and - boom - they take off. Wise heads always learn something new...