Some questions regarding tenellus/bacopa plant deficiency

[edc]

I just started my first planted tank on a 2.6 gallon tank for about 1months and 2 weeks now. I am wondering what's wrong with my plant and how to fix it. Hope to get some advice about what nutrient deficiency are the plants suffering from and also any tips and feedback to help improve the tank will be appreciated. Thanks alot !

1)I realised my Bacopa plants( the older leafs ) are starting to have brown edges / brown spots and some GSA on them.
They were growing tall towards the light too and the bottom of the stem are starting to grow new plants. Trimmed the top part of the plant as they were covering the hc plants and are growing out of
water surface

2)My tenellus are propagating as i see runners under the soil but the older leaves seems to have these black edges and few days or a week later they will turn fully black.
I tried trimming some away at the moment.

At first before 3-4 weeks of setup I didnt dose any liquid fertz but decided to try a dosage of Seachem Flourish about 0.25ml once a week after about 30% water change.
Currently doing 2-3x water change of 10% every after 2 days and 1 30% water change on the weekend. For dosage, I dose Seachem flourish ( once a week ), Seachem Phosphorus twice a week about 0.10-0.25ml and EIHO Plant potassium about 2-3x a week 5-10drops from the bottle.

I was dosing Aquameds Iron+Trace elements bought at c328 before for once a week after 3rd week of tank setup and stopped dosing after i bought seachem flourish and saw GSA spawning like crazy on the tank glass.

Tank Info:
Lighting - Lights(30cm Up Aqua Z-series light)
Filter - Shiruba PF60 Hang On Filter 60L/h
Substrate - ANS Planta soil and planta-clay minerals from east aqua ocean
Lighting duration: 4-6 hours first 3 week. Increased to 8 hours after installing co2 system.
CO2 - UP A-149 Pierce CO2 system ( Disposable Cartridge ) Setup after 3rd week of tank setup
Faunas - 2 Otos , 1 Guppy , 4 ember tetra , 3 CRS ( just added 3 days back ) , Pond snails hitchhiked from HC plants seems to have about 4-5 now.
Had 3 guppies and 1 ember tetra dead while inital setup but the first one i ever bought still surviving till now not sure why. Only feed fishes once a day weekend no feeding is done.
Plants - Monte carlo ( all died during initial ) . Bacopas . Tenellus . Hydrocotyle Tripartita . Brazillian Pennywort . HC and HM hitchhiked in batch bought from c328 . Cryptocoryne not sure which kind .
Had a Anubias tied on a rock under the filter. After 2 weeks,They melted and leafs were weak and removed them. Yellowish leafs / Brown edges

Pictures:
Bacopa symptom
1-http://postimg.org/image/u9ammhzbp/
2-http://postimg.org/image/8yhnvz6l1/

Tenellus symptom
1-http://postimg.org/image/ppye0zhg5/
2-http://postimg.org/image/3vvqng7x1/


Initial setup images
1-http://postimg.org/image/ud4g2r4t1/
2-http://postimg.org/image/t0mr0v7dh/

Current tank look
1-http://postimg.org/image/yjpai34et/

[milk_vanilla]

Hi,

Seems like either co2 level issue, or flow/ distribution issue + high intense light. There's a chance where the plant is in the middle of transition between emerge to submerge. As long you could see healthy young bud come up, you could wait and see

[Urban Aquaria]

If your plants are growing fresh new healthy submersed leaves, then it probably means the conditions are okay for them and the old emersed leaves are just melting away as expected... you'll just have to trim away the melting parts as part of plant maintenance.

For stem plants like barcopa, just uproot the stems, cut off the healthy tops, throw away the melting bottoms, then replant the tops (this has to be done regularly with most stem plants anyways, as the bottoms will turn old over time and the healthy tops need to be replanted)... do not just cut and throw away the healthy tops and still keep the old bottoms, the old parts will continue deteriorating and will not repair itself.

Btw, if you look at the photos of your barcopa, the stems have fine hairs on them, those are still the emersed stems (submersed stems have very little or no hairs)... therefore those should be cut and removed once new healthy submersed stems grow out.

For plants like cryptocoryne and anubias, their emersed leaves will usually melt and shed away during the initial transition period, and then new healthy submersed leaves will grow to replace them. They are slower growers so just need extra time to transition.

[edc]

Thanks UA and milk vanilla