TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Process: The reactor operates in condensed mode, with alkane entering the reactor at 2-50 wt.% based on the total weight of the fluidizing medium. An aluminum alkyl (1 - 500 wt ppm) is also introduced into the reactor. The I21 of the polymer composition decreases upon an increase in the amount of aluminum alkyl to the reactor. The I21 decreases by 2 - 50% when the level of introduction of aluminum alkyl, control agent and water to the polymerization reactor remains constant. The gas phase polymerization reactor is operated at below the melting point of the polymer composition to 50degreesC. An aluminum alkyl, and an alkane (1-10 wt.% based on the flow rate of primary monomer) are added to the polymerization reactor to obtain the polymer composition having a I21 of A; followed by the introduction of a control agent (0.1 - 100 ppm based on the flow rate of primary monomer) and optionally water (1 - 50 ppm based on the rate of primary monomer) introduction to the polymerization reactor to obtain a polymer composition having a flow index value of B; where the value of A is lower than the value of B by greater than 2 dg/min in I21 value. Hydrogen, an aluminum alkyl, and an alkane (1 - 10 wt.% based on the flow rate of primary monomer) are added to the polymerization reactor to obtain the polymer composition having a I21 of A; followed by the introduction of a continuous amount of a control agent (0.1 - 50 ppm based on the flow rate of primary monomer) and optionally water (1 -50 ppm based on the rate of primary monomer) introduction to the polymerization reactor, the introduction of control agent and optionally water is at the recycle line upstream from the heat exchanger of the polymerization reactor, to obtain a polymer composition having a flow index of B, where the value of A is lower than the value of B by greater than 2 dg/min in I21 value. Preferred Components: The bimetallic catalyst composition comprises a first catalyst component and a second catalyst component. The first catalyst component produces a low molecular weight polymer and the second catalyst component produces a high molecular weight polymer. The polymer composition has a target I21 of 3 - 200 (preferably 4 - 50)dg/min when alkane (0.5 - 10 wt.% based on primary monomer feed rate) and control agent (0.1 - 40 (preferably 1)wt. ppm based on the feed rate of primary monomer) and/or water (1 - 50 wt. ppm based on the feed rate of primary monomer) are added to the reactor, and a decrease in the amount of alkane precipitates a removal or decrease of the amount of control agent and/or water; and a target I21 of 4 - 100 (preferably 4 - 50)dg/min when alkane (0.5 - 10 wt.% based on primary monomer feed rate), aluminum alkyl (50 - 200 wt. ppm based on the feed rate of primary monomer), and control agent (0.1 - 40 wt. ppm based on the feed rate of primary monomer) and/or water (1 - 50 wt. ppm based on the feed rate of primary monomer) are added to the reactor, where an increase in the amount of alkane precipitates introduction or increase in the amount of control agent and/or water, and an increase in the amount of aluminum alkyl precipitates an introduction or an increase in the amount of control agent and/or water maintains the I21 value of the polymer composition at its target value. The control agent is in a nebulous or gaseous state at 50 - 120degreesC and a pressure of 1 - 100 bar. The gas phase reactor comprises a recycle line, where the control agent is added to the recycle line downstream of the heat exchanger. The control agent is selected from alcohols, ethers, aldehydes, ketones, amines, O2, and/or carbon monoxide (preferably 1-10C mono-alcohols, 2-10C mono-ethers, and/or oxygen). The polymerizable monomers are ethylene and an olefin selected from 3-10C alpha-olefins.    TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Components: The bimetallic catalyst composition comprises an inorganic oxide support and at least two catalyst components selected from metallocenes, Ziegler-Natta catalysts, and metal-amido catalysts (preferably inorganic oxide support, metallocene and a titanium and magnesium-containing Ziegler-Natta catalysts), metallocene containing at least one fluoride ion leaving group. The inorganic oxide support is silica having an average particle size of at most50 mum and a pore volume of 0.8 - 5 (preferably 1 - 2)cm3/g.    TECHNOLOGY FOCUS - POLYMERS - Preferred Components: The polymer composition is a bimodal polymer composition having a molecular weight distribution (Mw/Mn) of 2.5 - 150 (preferably 15 - 150), a molecular weight distribution (Mz/Mn) of 2 - 10 (preferably 3 - 10), an I2 of 0.01 - 10 (preferably 0.01 - 2)dg/min, an I21 of 4 - 100 dg/min, and density in the range of 0.890 - 0.970 (preferably 0.930 - 0.960)g/cm3. The polymer composition has a dynamic viscosity eta at 200degreesC and 0.1/sec of from 100 - 3000 (preferably 300 - 1400)kPoise as measured by ASTM D 4440-84. The molecular weight distribution (Mw/Mn) of the high molecular weight of 3 - 24. The polymer composition has an Mz value of greater than 200000 (greater than 800000amu. The high molecular weight polymer has a weight average molecular weight of 100000 - 1000000 (preferably 250000 - 800000)amu. The low molecular weight polymer has a weight average molecular weight of 5000 - 100000 (preferably 5000 - 80000)amu. The polymer composition is formed into a pipe or film. The polymer composition is injection molded, blow molded, roto-molded or formed into a sheet or tubing. EXAMPLE - Polyethylene composition (inventive) was prepared using isopentene (4.2 wt.% based on ethylene feed), TMA (100 wt. ppm based on ethylene feed), H2O/C2 (19.8 wt. ppm based on ethylene feed rate), residence time of 3.45 hours, ethylene partial pressure of 204.5 psia, H2/C2 measured ratio of 0.0110, hexene/ethylene of 0.009, and H2/C2 of 0.71. Another polyethylene composition (comparative) was prepared similarly but without isopentene. Results of FI (dg/min), MFR and density (g/cm3) for inventive/comparative polyethylene were 13/13.9, 134.8/138.6, and 0.9499/0.9502, respectively.