Well I'm not really sure what Tom's flow rate is. He'll have to provide the details, but if you have a 130L tank then a 1500L filter should do a decent job because that easily satisfies the 10X rule. If you say that you were not getting decent flow out of it then I'd have to suspect that there is a problem with the filter, maybe a blockage or something like that. A 1500LPH rated filter should produce an actual flow of about 700LPH so maybe you can test this by pointing the outlet pipe into a container and using a stopwatch to time the flow for say, 10 seconds. Measure how much water is in the container and multiply that value by 360, which would give you the actual LPH.
If you port that flow into a spraybar you should get a pretty good spray across the width of the tank. The jets should easily hit the front glass. If you then mount the powerhead in the location along the back wall that the spraybar doesn't reach then that would help give you even flow along the length of the tank. Another configuration you could try would be to mount the powerhead just under the spraybar. Since most of your plant mass is on the left then mounting both on that side might be a better idea. You just need to play around with that for a while to see what works best. Remember also that you don't need to have the filter chock full of media. Media slows down the flow so you can take half of it out to get you better throughput. You also need to check that you don't have any kinks in the tubing and make sure that you haven't connected some other equipment that reduces the nominal pipe diameter.
In any case, squirting the water across the short distance of the tank is easier then squirting it across the longest dimension, so just give it a try and see how you get on.
Cheers,
If you port that flow into a spraybar you should get a pretty good spray across the width of the tank. The jets should easily hit the front glass. If you then mount the powerhead in the location along the back wall that the spraybar doesn't reach then that would help give you even flow along the length of the tank. Another configuration you could try would be to mount the powerhead just under the spraybar. Since most of your plant mass is on the left then mounting both on that side might be a better idea. You just need to play around with that for a while to see what works best. Remember also that you don't need to have the filter chock full of media. Media slows down the flow so you can take half of it out to get you better throughput. You also need to check that you don't have any kinks in the tubing and make sure that you haven't connected some other equipment that reduces the nominal pipe diameter.
In any case, squirting the water across the short distance of the tank is easier then squirting it across the longest dimension, so just give it a try and see how you get on.
Cheers,