Just go easy with the stocking as Rays produce a lot of waste and the filters need to adapt, that said the Oscars produce a lot of bioload therefore if you can keep the water stable you should be fine.
Retics are only hard to get going as they are sold in such poor condition due to shipping stresses with loads packed together in poor water.
Make sure they are feeding well in the shop with big fat behinds and big fat tails.
Do not be afraid to put down a deposit and visit the shop regularly to see them feed (you could even get a stool sample tested for worms / parasites) do not be afraid to ask the shop to test their own water for ph and nitrate etc to see what they are being kept in (I would assume a shop has zero ammonia and nitrite)
Be wary that the Oscars COULD cause the rays some issues so be prepared to shift one or the other out. I would shift round the decor when you add the rays to keep the oscars guessing and keep the lights off for a few days.
Personally I test the water weekly for Nitrate and spot check the others (do not use dip stips) I monitor the PH constantly with a digital tester (same with temp) I also keep an ammonia alert disc in my sump and check this every day or so (just to be safe) The SAS say "check, check and check again!
Retics are only hard to get going as they are sold in such poor condition due to shipping stresses with loads packed together in poor water.
Make sure they are feeding well in the shop with big fat behinds and big fat tails.
Do not be afraid to put down a deposit and visit the shop regularly to see them feed (you could even get a stool sample tested for worms / parasites) do not be afraid to ask the shop to test their own water for ph and nitrate etc to see what they are being kept in (I would assume a shop has zero ammonia and nitrite)
Be wary that the Oscars COULD cause the rays some issues so be prepared to shift one or the other out. I would shift round the decor when you add the rays to keep the oscars guessing and keep the lights off for a few days.
Personally I test the water weekly for Nitrate and spot check the others (do not use dip stips) I monitor the PH constantly with a digital tester (same with temp) I also keep an ammonia alert disc in my sump and check this every day or so (just to be safe) The SAS say "check, check and check again!
