I've got a 55gal Carbon-supplemented tank, fully cycled. New to EI, about 3 weeks. Many new plants added at that time.
Dosing:
1/4 tsp KNO3 x 3
1/8 tsp MKP x 3
1/8 tsp K2SO4 x 3
1/4 CSM+B x 3 (alternate with macros)
10mL Excel daily
1/8 iron (DPTA) on non-CSM days
My hygro old leaves are falling away due to the new tank transfer, which I expected, but they're curling. Potassium?
My (sword?) has dark veins and a dark almost-texture to them.
My stem plant (what is it?) keeps losing tips, mostly on old leaves but still strong presence on new.
I am not an expert on using ferts, I generally dose less than what you're doing.
What is your lighting?
Why the excel if you're using co2? Algae control? Some plants don't do well with excel- you will see burning leaf tips, dropping leaves, etc.
In my non-professional opinion it looks like maybe too little light- too much fert dosing. Just a random guess though. Maybe one of the experts on here will chime in.
Good luck!
***edit*** maybe I misunderstood your post. It looks like your aren't injecting co2, that would cause all those symptoms. You could also help your plants alot with proper substrate. Large gravel usually doesnt work well.
Don't know about the wisteria but the other plants are growing healthy new leaves and stems that are doing just fine. Most of the time new plants come into my tank the old growth declines in health but new shoots and leaves are healthy. The last photo is Rotala rotundifolia and looks like mine. I run too much light which means there probably isn't enough CO2, possibly the case here as well. Might raise the lights or put something to shade the tank a bit and only run the lights for 7-8 hours. Lower light might be fine but my plants sure let me know that a shorter day is not acceptable.
I would dose abut 1/4 EI if you use non CO2 Excel dosing.
IME/IMO, add a lot more plants.
You likely only need 1 of those bulbs, not both, so if you can turn one on for say 5 hours then off, then the other on for the last 5 hours, that would be best.
This is 100% CO2 related.
Excel will take a little time for the plants to bounce back, and that is reflected in your growth.
Since you are only doing 1/4 EI, you likely can reduce the water changes once things settle down to monthly.
2 T5HO is High light on a 55 Gallon and needs pressurized Co2. Either cut back on lights and only run one bulb, add some window screen or raise your lights about 10-12" above your tank. You could also choose to keep the lights as they are and get pressurized CO2. Lots of options, but your current set up needs modified. Also check your dosing as others previously mentioned and do your weekly water changes 40-50%.
FWIW, I have (2) 54w T5s on a non-CO2 40-gal-long, and I don't have the option to use only one bulb either, so I use the screen approach and run them 10 hours a day on a split photo period (5 hours on, 5 hours off, 5 hours on). Seems to work -- everything is growing well, some things better than others. Water sprite and brazilian pennywort growing like weeds. Red myrio has been trimmed trimmed/thinned several times in 2 months. Swords are all growing new leaves. Banana plant went from 2-3 leaves to 7-8 huge leaves in a month. Bacopa carolinia is sprouting new plants at the base. Vals are growing slowly. Microswords are the only thing that are struggling.
I asked this very question of the distributor of my fixture, who contacted the manufacturer, who said "don't do it". They said it would either burn the bulb out really quickly or would burn it out immediately.
Any other educated guesses or opinions on what's going on?
Funny thing is that I was using this same light strip before (2 years ago) with same tank and plants and they were growing great. Sometimes this hobby can be so challenging!
I've got a 55gal Carbon-supplemented tank, fully cycled. New to EI, about 3 weeks. Many new plants added at that time.
Dosing:
1/4 tsp KNO3 x 3
1/8 tsp MKP x 3
1/8 tsp K2SO4 x 3
1/4 CSM+B x 3 (alternate with macros)
10mL Excel daily 1/8 iron (DPTA) on non-CSM days
... snipped
When I first wrote this, I was dosing Iron daily. So, I was doing all my dosing at night, then Iron and Excel in the mornings. It put time between Phosphate and Iron, reducing interaction. Then, realizing my Iron was getting a little high, I started skipping iron dosing the morning after CSM (which contains iron).
You are spot-on, but with 12 hours between iron and other nutrients, I think I'm okay.
Ok .. good deal. Yeah the time between your dosing would definitely seem long enough. I now only dose most tanks once a week since they're low light .. one day macros, next day micros and iron. Good to know I'm doing iron the right day. I keep confusing myself when to dose it .. getting to old to remember one week to the next. :icon_conf
I just realized I said I had 130w T5 for 55 gal. My bad...
I have standard compact fluorescents. Is approx 2 watt/gal of CF still too much light? I've cut my photo period back to 8 hours, but feel like 10 hours of full 130 watt CF lighting should be fine for an Excel/EI dosed tank.
If you go CO2, then we can modify.
If not, use the Excel the way I mentioned.
5mls per 10 gal of tank each day.
Add more plants.
Cut the ferts by 75%.
Do a few more water changes till the tank cleans up, then back off.
Excel is only going to increase growth maybe 200-400%, whereas CO2 gas will increase it 1000-2000%.
The directions are for lightly planted tanks, if you have plenty of plants, you need more. FYI, I've bred fish in tanks dosed that much, and there's 101 people suggesting dosing 2-3x what I'm suggesting to kill algae etc.
I've likely used excel longer than anyone on this forum and at that dose(Check APD if you wish, it was a time before "forums" existed).
I've upped the Excel and will reduce my ferts across the board as you suggest.
Thanks!
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