Ok let me get organized.
1. Did you test those rocks to make sure they are nonreactive?
2. The flow from the 304B on my 75 is almost non-existent. Even with a supplemental AC70 it isn't good enough... but the Sunsun powerheads are too strong especially for stems. I would add a secondary filter like an AC for sure.
3. Do you plan on keeping all of those rainbows or growing some out, keeping best males and rehoming the rest. There are some gorgeous Rainbows and mass produced Bosemani aren't a good representation. I would leave some room for yellow rainbows, Kamaka, Red Laser, Goyder River, Wanamensis, Dorityi.... there are some stunning Rainbows. Just presenting the idea up front for your consideration.
4. The FSPEC was not adequate on my 75 which has the same depth. I added a DA and that got me where I needed to be. Both come on at 930am. The DA shuts off at 2pm and the FSPEC shuts off at 9pm. Once I got some good plant mass I was able to extend my viewing hours, but you may need to have a shorter photoperiod.
5. Rainbows jump. Make sure you have a lid.
6. A reactor is so much more efficient and easier to maintain. The diffuser will clog up and need cleaning and give you the soda water effect... with less diffusion. A reactor is like $30 in parts and maybe 10 minutes of work.
Thanks for you comments! Here are some answers/ thoughts:
1- Yes, passed vinegar test and used in aquarium for over a year prior to this scape. Just did a bleach and waster clean, rise, and dry, then added to new scape.
2- Thanks, good to know it's not just me with the SunSuns. I'll keep working to figure out flow source. I eventually want an inline heater, and possible reactor (more below) so maybe a 2nd canister would be best, one with heater, one with reactor.
3- Agree with this on mass produced rainbows. My thought is run with these guys for a while and see what they grow into, with the idea of rehoming some down the road. I like the idea of having only a few species at this time, that being the boesmani and turquoise. Good news is there are lot's of hobbiests who enjoy the rainbows where I live so not too concerned with potentially fining a good home for some in the future.
What I do have available right at my LFS are Millineum, Red, Wapoga, Wanamensis, Boesmani, Turquoise, and Praecox
I also want to add bottom feeders, thinking some kind of cory, and either Roseline Sharks (dennison barbs) or a smaller schooling fish. Anyone have thoughts on this? Headed to the LFS tomorrow to mostly finish stocking.
4- Good to know. The DA is the 6500K, correct? That would be good to add down to road to help balance some colors out. I have on my 29 gallon the same FSPEC, but also run 2 6ft strips of Phillips Hue Gen 2 Led Strips (color, intensity, and temperature can be modified through Hue app and or/ SmartThings. True RBGW strips.) to bring more intensity during the day and allow for a ramp up/ down. Note those are pricey lights that I happened to get an amazing deal on, and have extras lying around the house. Might use some on the 55 also to tune the colors. If I didn't already have them, I would not use them.
5- Yup! Just switched from the black cheap lids with stock led to glass lids to run the lights and keep fish in the tank!
6- Yeah, I really think I'll build a reactor. I just looked over at the 29 gallon tank, and already it needs a bleach dip... yuck.
I am thinking planting will be a few weeks out still. I want to really think it through. Some nice compact plants would be nice around the rocks on the right, and some larger either ferns or crypts (I have a MASSIVE cryptocoryne undulatus red in the 29 reaching the top of the tank right now) on the left side? Not sure if I am wanting demanding stems at this point in time. Maybe do some more demanding plants in the 29 gallon, and keep this one more about the fish.