1) is about 1000 gph enough filtration
If the pump is rated for 1,200 gph… and is then under a few feet of head pressure… and slightly restricted with a ball valve… it is unlikely that it is actually performing at 1,000 gph. If it is rated for 1,200 gph at your given head pressure, then 1,000 gph very well may be accurate…
I’ve often read that moving your tanks full volume through your sump at a rate of 5 times per hour will give you adequate bio-filtration. This comes out to 900 gph…
For adequate mechanical filtration moving your water through filters at a rate of 10 times per hour is typically suggested. The extra current helps move waste/debris to the intakes. Provided you do adequate weekly maintenance on the tank then having ‘weaker’ mechanical filtration is not a concern for the fish, only for your viewing pleasure..
2) Are powerheads something you would recommend and what benefits will it provide my tank? Please let me know and please recommend a powerhead for me. Thanks
Powerheads are definitely not a requirement for any tank, but avoiding dead spots is our responsibility in every tank and powerheads are one way we can do that. Powerheads can also be used to move waste/debris either to a filter intake or out from under/behind décor so that we can clean it out during our water changes.
There are many quality powerheads on the market. Maxijet and Aqua Clear are both good brands. Hydor’s Koralia powerheads have a unique design which causes water to “fan out” from the powerhead as opposed to coming out in a “stream line”. I have found this fanning out flow to work wonderfully at giving general water movement & moving waste / debris without disturbing the fish or the substrate (sand).