my large gourami isn't eating. the younger one is eating, but seems to be watching the other and spits everything back out. they are on tetramin tropical flakes and tetracolor tropical flakes. they have been fed twice daily- morning and night- and they have always ate. but now they've stopped. it's gone on now for 12 hours. i can't give water perimiters- no kit (i'll get one this weekend, promise!!) the tank got redecorated on friday, but the pleco isnt' botherd (he's hanging out in the cave) and is eating fine. anyone know what's going on here?