@fluxtor, you never stop learning in this hobby and starting again will probably give you the same result as now.
fluxtor wrote: ↑Fri Jan 12, 2024 7:53 am
So not trying to eradicate cyanobacteria with carbon just control the hair algae. Been using seachem flourish and flourish excel at 1.5m daily of excel and 0.4m daily of flourish. Only started dosing this week with flourish.
Having never used Seachem flourish and knowing how much the recommended dosing is for Easy Life Easy Carbo so I looked up the dosing guide on their website:
Directions
On initial use or after a major (> 40%) water change, use 1 capful (5 mL) for every 40 L (10 US gallons). Thereafter use 1 capful for every 200 L (50 US gallons) daily or every other day.
For smaller dosing please note that each cap thread is approximately 1 mL.
Seachem.com
You say your dosing 1.5m daily of Excel (presume your talking millilitres) your dosing the Seachem Excel a tad high. 1 ml per day should more than enough and even then I'd say that's a little high. Do bare in mind with your aquarium is not filled to the brim and with the hardscape and substrate the total water volume in your 67 litre aquarium is probably nearer 50 litres of water total.
fluxtor wrote: ↑Fri Jan 12, 2024 9:02 am
Thanks, when you say spot dose with a syringe how much? Is it literally a drop or a squirt? I have some 1ml syringes.
While Hydrogen Peroxide does work in clearing Cyanobacteria, it is not a permanent solution to stop this bacteria returning. In newly setup aquariums it is not unusual for Cyanobacteria to form, particularly excess light, low nitrates and ammonia during or after the nitrogen cycle. It can also be caused by 'dead spots' where water flow is at it's lowest and quite often is found at the front of the aquarium on the substrate. By all means dose the Cyanobacteria with one or two drops of Hydrogen Peroxide but do remember, nature will fight back. In your aquarium, what I would term as a 'mid' tech setup you want the total water volume of your aquarium to be turning over to be around ten times per hour. I case your wondering, my 310 litre aquarium water turns over 15 times the total volume per hour.
Patience Grasshopper!
No two aquarium setups are ever the same and every aquarium goes through what I called algae stages before settling down, so patience is key to a successful aquarium. My current 310 litre setup took nearly two years to fully settle and even now you will find algae growth.
Personally, if it was my setup, with your 67 litre aquarium which I would call a nano size aquarium, start by reducing the Excel dosing to 0.5ml per day, 1ml per day of the Flourish fertilizer, 50% weekly waterchanges and no more that six hours of light photoperiod per day, this also includes any excess sunlight the tank maybe receiving. Remove to worse effected leaves, dying plant and excess algae you can. If at all possible increase your aquarium water circulation to ten times per hour. Feed your fish sparingly only a few days a week, it won't harm the and you'll find the Shrimps will get to work on the algae issue. Amano Shrimp can be very lazy knowing easy food comes daily. Once the algae has all but near gone and you see the Shrimps swimming around, then it will be time to feed them. I would not add any more stock to your aquarium for the foreseeable future, as that will just add more issues, more excess nutrients in the water column which you don't want but the algae will love! Some additional fast growing plants will help and embrace what you have.
Hopefully given time the algae will recede as your plants take hold.
All the best, M.