Plants are being snipped off mysteriously
I can't figure it out...
Every morning I wakeup and more peices of vegatation are floating in the corners of my tanks.
I've got a 120 g tank containing
10 Cardinal Tetras
8 Brilliant Rasboras
9 White Clouds
and 30 1/4" shrimp.
The tank was having the weird self trimming issue before the shrimp addition about 3 days ago...
Ph is 6.8-7.1 depending on time of day
10 hours of 3W lighting mixed T5 and Actinic
Dosing 1 ml of eheim plant ferts daily
kH is 10 gm/l
gH is 11 gm/l
(I've got hard water and am slowing bringing these down with each water change as I just bought an RO unit, both gh and kh were over 14 2 weeksa ago)
PO4 is .5
Nitrite is zilch
nitrates are zilch
temp is 79.5 more or less depending on lighting
I don't have any other test kits.
I had a ick problem 2 weeks ago and lost some cardinals... so I turned the temp up a couple of degrees and added a UV sterilizer last week.
The mysteriously trimmed off plants problem has been increaseing as time goes by and this morning was the worse ever... the UV didn't do anything to stop that... but with the introduction of the UV my Wisteria appears to be kinda greyed in color now (maybe some trace element is being oxidized by the uv before the wisteria can get it?). also with the UV seems the hornwort (the submersim species) is looking kinda bad..
But the other plants are all doing much better.
The "trimmings" are from variety of plants but the wisteria has been left alone. The peices of vallisneria are 1 to 2 inches long and look cut off straight across the stem. Then there are snips of ludwigia that are anywhere from a leaf to a 3 inch section of stem. the stem also looks cut clean through. And there are lots of lost little peices of hornwort and camboma leaflets. Also my baby tears has been snipped off, but not as much as the other plants... the peices of baby tears are about 1 to 2 inches long and the stems look snipped.
Nothing looks chewed on...
This is weird... I don't have any major plant eating kinds of fish...
Maybe I've got some weird invert that only comes out at night that I don't know about?
Anyone got any ideas?