Low pH in the apartment system but growth is good

I checked out the system this week, and it seems to be doing well.  The brown algae in the water is slowly disappearing.  The veggies are growing well, though the strawberry seeds that I scattered in one pot don’t seem to be growing too quickly.  My friend hadn’t checked the chemicals recently, so I did while I was there.  The pH was very low (<6), but everything else looked ok.  The ammonia was 0.5ppm.  Nitrite was zero, and Nitrate was 160+ ppm.

I added 6 capfuls of API’s pH up.  I decided that I didn’t want to rely on my friend checking the pH and adjusting, so I added enough pH up to bump up the pH to around 7.  Normally I wouldn’t want to raise it more than 0.2 per day, but I didn’t want to risk losing the bacteria and have to re-cycle the system.  My friend added a little water the next day, and checked the pH.  It was about 7 – 7.2, which is ideal.  Hopefully this weekend I can visit for a few hours to clean the canister filter, and plan out new fish that we want to put in the fish tank.  We’d also like to mount some small lights that we have onto chains above the grow bed.  Another issue is that the water draining is somewhat loud, so I want to figure out a way to muffle the draining water.  Here’s some pictures and a video from my visit to the system.

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Finally an Update!

It’s been quite a while since my last update, and I’ve had a lot of developments, so here we go!

The AquaFarm from Back to the Roots had been making a decent amount of noise as the air pump rattles against the plastic container.  I tried to adjust the foam insulation pad, but it was difficult to keep the thing quiet.  I was away from my apartment during my trip to Burning Man, so I moved the betta into a different tank and had a friend take care of him for me.  The wheatgrass grew well, but the basil and other herb didn’t grow very well.  Right now the system is empty, and I’m planning on starting it up again in the next few weeks.

The 105 gallon system at my friend’s apartment is still slowly moving forward.  My friend is taking a trip to Nepal, so his room got a new owner.  My buddy Saqib is going to look after the aquaponics system from now on, and I’m glad that he’s excited about it.  The seed plugs (coco coir, I think) started developing a white mold, so I broke off the plugs and planted the seedlings directly into my grow media.  I also installed a drain plug into my bell siphon to keep rocks from messing up the drainage cycle.  Pogo had bought 6 full grown tilapia for the fish tank before I left for Burning Man, but only one is still living.  I would have preferred to start with fingerlings, but one large tilapia will do fine for now.  His name is Hercules.  I think Saqib and I are on the same page, and want to eat Hercules and fill the tank with smaller, decorative fish.  I also want to cover the sides of the system’s frame with cloth to keep sunlight out of the filter and fish tank.  Some algae grew inside the filter, that I need to clean out, so hopefully the lack of sunlight will fix that in the future.  The pH seems to be slowly, but consistently dropping, so I’ve had to add pH up a few times.  I’m not sure what’s causing the pH drop, yet.  We’re working out the little kinks in the system, so I’m excited to see how it works out.  I’ll update when we have some new developments!

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