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Discussion Starter · #161 ·
I may have spoken too soon. I can't think why I'm experiencing an outbreak of hair algae for the first time. I'm not doing anything different than I have been since I purchased the floodlight I'm using, back in May. The snails may be falling down on the job:
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Discussion Starter · #162 ·
It's been a while since I've posted about this porcelain bowl. But, before I go on, there is one bit of bad news to report: The apistogramma adult male (I call him the beta male to distinguish him from the alpha male that remains in the breeding tank) died after appearing rather sluggish for a few days. He is survived by two adult females of the same species and 5 glo-fish zebra danios.

This was especially disappointing because they all seemed to be getting on well together. The danios spend the entire day swimming in circles while the apistos lurk in the shadows, only coming out at mealtimes. Mealtimes did tend to be competitive and for a while I worried about the apistos getting enough to eat. I increased the portions, even as it seemed some of it went wasted.

I also thought about swapping out one male for the other in the belief that perhaps the beta male could benefit from a change of venue. But alas he passed away before I could make up my mind about it.

As for the rest of the bowl, a friend came by the apartment the other day and remarked that I had a beautiful "potted fern" in my dining room. It was only after he peered into it that he realized there were fish in it:
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Another thing I fret about is the rate of oxygen being exchanged at the surface as keeping the floaters under control is a constant concern:
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Another thing I fret about is the rate of oxygen being exchanged at the surface as keeping the floaters under control is a constant concern:
I can only comment anecdotally on this, but in the tanks I keep, the surface is always clogged with plants. I use water lettuce as a floater, and I like to keep fast growing rooted plants that grow up and across the surface. I have to pull water lettuce and prune almost daily just to make a space to drop food in. I have never observed any apparent detriment to non-plant life that would suggest a gas exchange issue.

The larger concern for me in regard to floating coverage is that it blocks light from lower levels. Gas exchange does not appear to be an issue from what I have seen.

Best,

Chuck
 

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Discussion Starter · #165 ·
Have any of the glofish fries survived?
I'm sorry to report, no. The few that I spotted in the breeder tank disappeared gradually. But that was in a tank with an active predator in the form of the alpha apisto male. What I'd like to do eventually is swap out the danios with the surviving alpha male and turn the breeder tank into a community tank with just the danios and the juvie apistos. I'm gambling that more glo-fish fry would survive that environment and I think it would also be good for the juvie apistos to have some chill adults around to serve as role models (at scarcely a half-inch long, they are already showing signs of aggression with each other.)

Anyway, whoever said raising fish was dull!
 

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Bowl is beautiful and I love the surrounding arrangement.
I don't think that the bowl will support many fish and oxygen deficiency is a possibility.
You mentioned keeping plant debris to produce CO2. I would not do that--at least purposefully-- for this small setup (no aeration and few or no submerged plants to produce oxygen). Emergent plants get their CO2 from air.
I would remove excess debris and not add more fish (i.e., do not increase your stocking density).
The algae growth you see fortuitously plays the role of submerged plants. It oxygenates the water. In this situation, algae is a bonus!
Note: It is refreshing that you have such interest in ecosystem processes and are sharing your observations with us.
 
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