This is my 75 gallon tank:
Fish:
9 - Angels (all related resulting from previous breeding efforts, 3 generations, most are actually culls, but had nice personalities so I kept them as a group)
2 - Black Neons
1 - Ember (the only remaining ember that was missed when I re-homed a number of them, he has been with this group of Angels for some time now)
Inverts:
Multitude of ramshorn snails both gray and red body types
2 - Nerites
Substrate
- 1.0/2.0 mm purchased gravel, natural rock with some nice red tones
Hardscape
- Various, inert, rocks I have collected, including Jasper, Obsidian, and banded Gneiss
- Wood locally collected western cedar and red alder
Plants
- Jungle Val (Vallisneria americana - I believe)
- Other plants I have forgotten the name of pulled from other tanks.
- Difficult to get plants to grow under the dense vals that cover 2/3rds the top of the tank.
Equipment
- Fluval 407 canister filter
- Fluval 300 watt heater
- Nicrew G2 at full strength now, 9 hours
The tank was laid out to have two zones the lighted zone to the right and the dark zone to the left. When they angels breed, every month 1 or 2 days after water changes, they always use the large rock to the left. The middle piece of wood is a hollow stump I put in the tank to provide shelter for the ember and neons but they don't use it, the smaller angels do. The jungle val is all full length with some leaves in the 2 meters (6') in length, it is what I use to keep the light down on the left side of the tank. The vals consume a mass of nitrogen compounds but I still have to fertilize them to keep them from going chlorotic, I was gone on a 2.5 week vacation (with autofeeders) and the nitrates were still between 5 ppm and 10 ppm when I got home. I find it hard to believe this was the tank I had major issues with cyanobacteria when it was newer.
To most measures this tank is overstocked. I have tried breaking up the group of angels, but I always have issues when I do. The angels, other than the larger blue and striped male, are really culls I had kept and they are a lot smaller than the ones I sold. I am not keeping any fry from the breeding of these fish because they are too inbred. If I breed more fish I will start with better parents. The large blue male is the first angel I have ever bred (front and center on second picture). Overall the angels seem to mostly stick together except when the large male breeds, then they stick to the right side of the wood in the middle for a couple of days.
I run the filter at full speed directing the water over top the vals from right to left. The vals reduce the strength of the flow allowing the angels to comfortably use 90% of the tank. I also use a pre filter (left side barely visible) made up of a media bag and a spacer, this allows the fish to feed on waste food before it goes into the filter and gets trapped there. It has been months since I have cleaned the filter, I am a strong believer in using a prefilter.
The angels are the most interactive fish I have owned other than oscars, and they are a lot easier to keep. These angels seem to be able to differentiate between my wife and I and behave differently depending on who approaches the tank.