Ive read the sticky....few more questions

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mzhantsche

Feeder Fish
MFK Member
Nov 3, 2010
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Hey ray people, I am thinking about getting a motoro.

I know they get huge. The one im looking to buy is about 7". I currently have a 60"x30" foot print that holds 180 gal. I know long term this is too small for a motoro. I have plans on putting a nice pond in my home in 2 or 3 years. Would the growth rate be too fast to keep it in the 180 for a few years?

I wanted to house it with two bichirs i have. So far.....they have never attacked another fish that wasn’t meant to be food. I’ve own many bichirs and if they get aggressive I sell them off. Would two equal sized bichirs be ok with the ray?

I also own a black aro. about 14" right now. I read about a ray eating aros. is this only when their adult size or can this happen at smaller sizes? Good tank mate?

My ph is kind of high at 7.4. I read mixed things on the sticky and comments that people have made about what ph they use. Id love to bring the ph below 6.8. Will it be ok if I have to use 7.4 ph?

My nitrates are usually around 20ppm. I do 25% water changes weekly. I was considering doing 40% water changes from now on, to see if that will bring my nitrates down to 0ppm. Will nitrates at 20 ppm be a problem? Do the rays really increase the amonia and nitrates more than most large fish?

Please be nice. I’m new to rays and probably going to step on a few peoples tails but I just want to learn. I’ve kept aros and bichirs for a while now with great success. I feel i could make changes to be a great ray owner as well.
 
20 PPm Nitrates is nothing to be alarmed over, That being said you will have to up the water changes when you get the ray to keep them low because they make a huge bio-load.

How long a motoro can live in a 30" wide tank depends on if it is male or female but IMO a female will be fine in that tank for 2-3 years and a male could be housed in that tank for life

Bichirs tend to be a problem with rays because they both stay near the bottom most the time, At feeding times things can get nasty. You could always try it and remove the brichirs if you have issues

Aros and rays generally do fine together on some occasions an aro can get nippy with the rays. Depending on the individual ray they can be very good hunters and for some it seems like no fish is safe while others would be fine. If you keep the other fish larger than the ray you limit the chances of the ray over powering the other fish.

7.4 constant is IMO better than trying to adjust it.

Welcome to ray keeping everyone here means well and will try their best to help you just try not to take things personally if someone gets a little over excited :)
 
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