mmustelus
New Member
Tank details: planted 50 l, gh 7, kh 3, TDS 170, temp =23. inhabitants =15 pygmy rasbora, 8 pygmy cories (having issues with these), 25+ cherry and raccoon tiger shrimp. I do 10 -25% water changes weekly and have had no significant changes in other parameters (nitrates, nitrites, ammonia).
I have to add montmorillonite powder and crushed egg shells to increase my TDS - our local water is quite low (~ 50 TDS with kh =2, gh=2 and I previously had issues with dying neos).
I recently added half of the cories to my tank, I was worried that the high light environment would be stressful to them. They seemed super happy, 10 days later I added another 4. Things seemed great for 2 days and then I refilled my C02 (1 bubble every 2-3 seconds) and did a heavy trim of my grass and moss. Suddenly my cories are hiding. I dont know if its the C02 (I've switched it off for a day now - no changes), or the fact that I had my hands in there for a bit? The new 4 cories came from the same stock as the previous two but are a tad bit larger.
What can I do? They seem fine, I saw them swimming around at night, they're hiding not dead. Is it possible that the larger ones are more timid and affecting the behaviour of the others? Do I remove the two largest?
If it doesn't come right I will rehome the cories, I dont like having stressed out fish in my aquascape.
I have to add montmorillonite powder and crushed egg shells to increase my TDS - our local water is quite low (~ 50 TDS with kh =2, gh=2 and I previously had issues with dying neos).
I recently added half of the cories to my tank, I was worried that the high light environment would be stressful to them. They seemed super happy, 10 days later I added another 4. Things seemed great for 2 days and then I refilled my C02 (1 bubble every 2-3 seconds) and did a heavy trim of my grass and moss. Suddenly my cories are hiding. I dont know if its the C02 (I've switched it off for a day now - no changes), or the fact that I had my hands in there for a bit? The new 4 cories came from the same stock as the previous two but are a tad bit larger.
What can I do? They seem fine, I saw them swimming around at night, they're hiding not dead. Is it possible that the larger ones are more timid and affecting the behaviour of the others? Do I remove the two largest?
If it doesn't come right I will rehome the cories, I dont like having stressed out fish in my aquascape.