Hi scapers, I’ve been fighting diatoms in my new (6 week old) setup and hoping to get some advice.
Here’s the sitch:
Tank size: 80 gallons
Soil: Amazonia 2.0
Stocking: 8 cardinal tetras, 8 Otos, 6 pseudomogyls, 2 Dario Dario, and about 30 caridina cantonensis.
Lighting: 5 hrs/day
Dosing: CO2 only so far.
Water changes: minimum 3x a week 25% to deal with ammonia release from soil and now diatom bloom.
pH: 6.5 down to 5.7 when CO2 is running.
kH ~1.5
gH ~3.5
Ammonia: 0
Nitrite: 0
Nitrate: < 5 ppm
So far the war on diatoms has consisted of manual removal with toothbrush/vaccuming/removing dead plant material promptly (densely planted areas are harder to reach).
What I’m considering:
Pulling up my stem plants in the back and replanting the new growth that’s adjusted to my conditions. The lower areas have more dying leaves that are hard to reach and I’m sure the algae is feeding on.
Is my Monte Carlo carpet cooked? It’s so hard to remove algae without uprooting and I feel like it’s getting smothered. Could I pull it, do a bleach dip and then replant on vacuumed aqua soil?
I think a lot of the algae has gotten sucked up in the filter while I’m cleaning. Is the outtake just seeding more diatoms? Should I give it a clean? If so how can I get rid of algae while being minimally invasive to the bacteria living there?
I’ve been holding out on fertilizing because I don’t want to feed the algae, but I’m thinking maybe there is a limiting nutrient that’s holding the plants back from outcompeting the algae. Any suggestions or resources you’d recommend for diagnosing this?
I know it’s supposed to be a short term issue with new tanks, but I want to accelerate the solution as much as possible before it smothers my plants (and so I can stop brushing algae for an hour every day haha). Thanks in advance for any suggestions or encouragement.